Response of Element Distribution of Various Organs of Maize to Fertilizer Application

The effect of fertilizer application on biomass dry weight and element distribution of various organs of maize was investigated from the aspect of microscopic view to disclose the internal mechanism of fertilizer effect on crop. Five fertilizer treatments： no fertilizer （CK）, nitrogen phosphorus fertilizer （NP）, nitrogen potassium fertilizer （NK）, phosphorus potassium （PK）, and nitrogen phosphorus potassium fertilizer （NPK） were designed. Field experiment on the response of biomass dry weight and N, P, K, Cu, Zn, Fe, and Mn element distribution of stem, leaf and seed of maize （Zea mays L.） to different fertilizer treatments application was carried out. The results showed that dry weight and element content of various organs of maize were different. N content of various organs followed this order leaf〉 seed 〉 stem; P content of various organs was seed 〉 leaf〉 stem; K content was stem 〉 leaf〉 seed; and Fe content was leaf〉 stem 〉 seed. Fertilizer application reduced the differences of N, P, K, and Fe contents of various organs, and changed the size order of the dry weight and the Cu and Zn contents of leaf, seed and stem. Except for individual treatment, the response direction of N, P and Fe elements to fertilizer application was similar to Cu and Zn. The response of element content of various organs of maize to different fertilizer combinations was also different. The response extent of N, P and K major elements to fertilizer application was larger than microelement of Cu, Zn, Fe, and Mn; the response extent of stem and leaf was larger than seed; the response to NPK fertilizer treatment was bigger than NP, NK and PK. In the whole, response differences of element distribution to various fertilizer treatments were not remarkable. Besides, element distribution of various organs of maize was also influenced by the mutual effect of fertilizer varieties. The response direction and extent of various element distributions to different fertilizer treatments had both similarities and differences. Adjusting fertilizer application could change the biomass dry weight and element distribution of various organs of maize, thus promote the uptake and cycle of nutrient. This investigation could provide useful information for high production.     

Effect of four crop straws on transformation of organic matter during sewage sludge composting

A 45-d laboratory experiment was conducted to compare the effect of four crop straws on the transformations of organic matter(OM) during composting of sewage sludge. The four crop straws included rape straw, wheat straw, maize straw and rice straw. The following parameters such as temperature, OM, humic-like substances(HS), fulvic-like acids(FA) and humic-like acids(HA) were determined. The degradation of OM and the formation of HS and HA could be described well by the first-order kinetic model, while the FA content fluctuated during composting. T he maximal degradation rates of OM in the compost piles added with rape straw, wheat straw, maize straw and rice straw were 34.7, 46.9, 54.7 and 52.8%, respectively, and the final contents of HS were 118, 128, 141 and 134 g kg~(–1), respectively, while the humification indices were higher in the compost piles added with maize straw and wheat straw than in those with rice straw and rape straw. The results indicate that a higher hemicellulose content and a lower C/N ratio in crop straw can result in a higher rate of OM degradation and higher contents of HS, while a higher content of lignin can lead to a higher polymerization degree of humic substances in compost piles. The final compost piles added with maize straw has the highest contents of OM, total nitrogen and humus substance as well as the highest values of polymerization degree, while compost piles with rape straw have the highest potassium content and those with rice straw have the highest pH values.     

Evaluation of the Role of Mixed Amino Acids in Nitrate Uptake and Assimilation in Leafy Radish by Using 15N-Labeled Nitrate

In this paper, the role of mixed amino acids in nitrate uptake and assimilation was evaluated in leafy radish by using ^15N labeled nitrate. The mixtures of alanine, β-alanine, aspartic acid, asparagines, glutamic acid, glutamine, and glycine were sprayed to plant leaf two or four times. The activity of the enzymes related to the process of NO3- reduction （nitrate reductase, nitrite reductase and glutamine synthetase） was affected differently depending on the application rate of mixed amino acids. Applying mixed amino acids increased the fresh weight, dry weight, and N yield. The NO3 content was reduced to 24-38%, but no significant differences were observed in amino acids and proteins. In addition, the nitrogen derived from fertilizer and the ^15N-NO3-recovery rate increased to 2-8% and 15-47%, respectively. These results strongly suggest that the positive effect of mixed amino acids on nitrate uptake and assimilation might be attributed to the regulation on NO3- uptake and assimilation, but not to the preference for amino acids as sources of reduced nitrogen.     

Evolution of Nitrogen,Phosphorus and Potassium Fertilizer Application Rates in Cotton Fields and lts lnfluences on Cotton Yield in the Yangtze River Valley

[Objective] The historical evolution pattern of nitrogen （N）, phosphorus （P） and potassium （K） fertilizer application rate and its effects on lint cotton yield were explored to provide the theoretical basis for reasonable fertilizer management strate-gy in the cotton planting region of the Yangtze River Val ey. [Method] GGE biplot analysis method was adopted to analyze the correlation among N, P and K fertilizer application rate and lint cotton yield with the dataset of national cotton regional trials of the Yangtze River Val ey during 1991-2013. The linear and nonlinear regression analysis method was used to reveal the evolution of the fertilizer applying patterns, and analyze the effects of N, P, K application rates on cotton lint yield. [Result] The application rates of N, P and K fertilizer presented highly significant positive corre-lation with lint cotton yield, among which the potassium fertilizer was the strongest relative factor with lint cotton yield, fol owed by phosphorus fertilizer, while nitrogen fertilizer was the weakest factor. The application rate of nitrogen fertilizer was relat-ed with the test year in the pattern of a quadratic function, while phosphate and potassium had progressive increase linear relation with the test year in the cotton planting region of the Yangtze River Val ey. Meanwhile, cotton lint yield was in re-sponse to nitrogen fertilizer content increase with a quadratic parabola function, and increased with the applying phosphate fertilizer and potassium fertilizer content with linearly increasing function. [Conclusion] The increasing application amount of N, P and K fertilizer was general y beneficial to cotton yield improvements, however, ex-orbitant applying nitrogen fertilizer was unfavorable for cotton production, and a reasonable mixture formula of N, P and K fertilizer was better in terms of cotton yield-increasing effect.     

Changes of Organic Matter, N, P and K Content of Soils in Red Soil Areas Under Long-Term Experiment

The content of organic matter （OM）, nitrogen （N）, phosphorus （P）, and potassium （K） in the three selected soils, including Calcaric Purpli-Orthic Primosols （purple sand-shale parent material）, Dystric Turbi-Anthric Primosols （quaternary red clay parent material） and Typic Udi-Sandic Primosols （granite parent material） were studied under a long-term experiment by using crop straw and inorganic fertilizers at the Hunan Red Soil Experiment Station of Chinese Academy of Agricultural Sciences. The results showed that the contents of OM, N, P and K in the three selected soils increased after 23 years application of crop straw and inorganic fertilizers, but the contents increased much less when crop straw or inorganic fertilizers was applied alone. The nutrient contents in the three soils developed from granite changed more remarkably than those in the soil derived from quaternary red clay and purple sand-shale. It was also found that the contents of OM, N, and P increased slightly in the treatments without applying fertilizers or returning the crop straw to the root bed. Combined application of inorganic fertilizers and crop straw could remarkably increase the contents of OM, alkalihydrolyzable N and available K, the positive correlation between application of organic fertilizers and increase of OM in soil did not always happened, it provided evidence for the relation between appropriate C/N ratio and accumulation of OM in soil. The increase of nutrient content was influenced by the soil properties. By comparing the contents of nutrient in 0-20 cm depth in the three different soils, it was concluded that the most increases of OM, alkali-hydrolyzable N, and available P were observed in Typic Udi-Sandic Primosols with the average increase by 3.03, 27.38, and 21.73 mg kg^-1, respectively. The available K increased in Dystric Turbi-Anthric Primosols with the average increase by 25.82 mg kg^-1, while it decreased in Calcaric Purpli-Orthic Primosols and Typic Udi-Sandic Primosols. It was concluded     

Effects of N Application Rates and NO3-N to NH4-N Ratios on Yield and Quality of Flue-cured Tobacco Planted in Black Soil

Nitrogen is one of the important essential ele- ments for plant growth and the NO3- N and NH4- N are the two forms of nitrogen in soil absorbed directly by flue- cured tobacco. Many studies on the effects of N application rates and NO3- N to NH4- N ratios…     

Effects of long-term full straw return on yield and potassium response in wheat-maize rotation

The effect of long-term straw return on crop yield, soil potassium(K) content, soil organic matter, and crop response to K from both straw and chemical K fertilizer(K_2SO_4) were investigated in a fixed site field experiment for winter wheat-summer maize rotation in 6 years for 12 seasons. The field experiment was located in northern part of North China Plain with a sandy soil in relatively low yield potential. Two factors, straw return and chemical K fertilizer, were studied with two levels in each factor. Field split design was employed, with two straw treatments, full straw return of previous crop(St) and no straw return, in main plots, and two chemical K fertilizer treatments, 0 and 60 kg K2 O ha~(–1), as sub-plots. The results showed that straw return significantly increased yields of winter wheat and summer maize by 16.5 and 13.2% in average, respectively, and the positive effect of straw return to crop yield showed more effective in lower yield season. Straw return significantly increased K absorption by the crops, with significant increase in straw part. In treatment with straw return, the K content in crop straw increased by 15.9 and 21.8% in wheat and maize, respectively, compared with no straw return treatment. But, straw return had little effect on K content in grain of the crops. Straw return had significant influences on total K uptake by wheat and maize plants, with an increase of 32.7 and 30.9%, respectively. There was a significant correlation between crop yield and K uptake by the plant. To produce 100 kg grain, the wheat and maize plants absorbed 3.26 and 2.24 kg K2 O, respectively. The contents of soil available K and soil organic matter were significantly affected by the straw return with an increase of 6.07 and 23.0%, respectively, compared to no straw return treatment. K_2SO_4 application in rate of 60 kg K2 O ha~(–1) showed no significant effect on wheat and maize yield, K content in crop straw, total K uptake by the crops, soil available K content, and soil organic matter. The apparent K utilization rate(percentage of applied K absorbed by the crop in the season) showed difference for wheat and maize with different K sources. In wheat season, the K utilization rate from K_2SO_4 was higher than that from straw, while in maize season, the K utilization rate from straw was higher than that from chemical fertilizer. In the whole wheat-maize rotation system, the K absorption efficiency by the two crops from straw was higher than that from K_2SO_4.     

小麦秸秆碳氮比调控施用对烟叶氮磷钾吸收的影响

[目的]研究小麦秸秆碳氮比调控施用对烟叶氮磷钾吸收的影响。[方法]2008～2009夏种季节,于云南省曲靖市板桥镇进行田间小区试验,探讨小麦秸秆及其碳氮比调控后施用对烤烟产量、产值及上、中、下部烟叶对氮、磷、钾含量及累积吸收量的影响。[结果]小麦秸秆无论单独施用,还是碳氮比调控后施用均能促进烟叶产量、产值显著提高,同时,烟叶钾含量、钾和氮的累积吸收量也均有显著增加,而且小麦秸秆进行碳氮比调控后施用更有利于烟叶钾的吸收。与不施用秸秆相比,小麦秸秆单独施用、小麦秸秆＋苕子、小麦秸秆＋油枯、小麦秸秆＋尿素进行碳氮比调控后施用,烟叶产量分别提高6.59%、3.58%、5.98%、8.80%,烟叶钾含量分别提高3.85%、7.76%、8.82%、11.21%,烟叶钾的总累积量分别提高10.71%、11.62%、15.32%、21.01%,烟叶氮的总累积量分别提高9.76%、1.22%、8.14%、14.00%;而不同处理之间烟叶氮含量无显著差异,烟叶对磷的吸收降低。[结论]在烤烟生产中施用高碳氮比小麦秸秆,即要注意补充氮素调节碳氮比,也要考虑磷素的补充。     

Trends of Yield and Soil Fertility in a Long-Term Wheat-Maize System

The sustainability of the wheat-maize rotation is important to China＇s food security. Intensive cropping without recycling crop residues or other organic inputs results in the loss of soil organic matter （SOM） and nutrients, and is assumed to be non- sustainable. We evaluated the effects of nine different treatments on yields, nitrogen use efficiency, P and K balances, and soil fertility in a wheat-maize rotation system （1991-2010） on silt clay loam in Shaanxi, China. The treatments involved the application of recommended dose of nitrogen （N）, nitrogen and phosphorus （NP）, nitrogen and potassium （NK）, phosphorus and potassium （PK）, combined NPK, wheat or maize straw （S） with NPK （SNPK）, or dairy manure （M） with NPK （M1NPK and M2NPK）, along with an un-treated control treatment （CK）. The mean yields of wheat and maize ranged from 992 and 2 235 kg ha-1 under CK to 5 962 and 6 894 kg ha-1 under M2NPK treatment, respectively. Treatments in which either N or P was omitted （N, NK and PK） gave significantly lower crop yields than those in which both were applied. The crop yields obtained under NP, NPK and SNPK treatments were statistically identical, as were those obtained under SNPK and MNPK. However, M2NPK gave a significant higher wheat yield than NP, and MNPK gave significant higher maize yield than both NP and NPK. Wheat yields increased significantly （by 86 to 155 kg ha-1 yr-1） in treatments where NP was applied, but maize yields did not. In general, the nitrogen use efficiency of wheat was the highest under the NP and NPK treatments; for maize, it was the highest under MNPK treatment. The P balance was highly positive under MNPK treatment, increasing by 136 to 213 kg ha-1 annually. While the K balance was negative in most treatments, ranging from 31 to 217 kg ha^-1 yr^-1, levels of soil available K remained unchanged or increased over the 20 yr. SOM levels increased significantly in all treatments. Overall, the results indicated that combinations of organic manure and inorganic nitrogen, or retuming straw with NP is likely to improve soil fertility, increasing the yields achievable with wheat-maize system in a way which is environmentally and agronomically beneficial on the tested soil.     

The Differences of Physiological Characteristics and Yield of Northern Japonica Rice in Different Nitrogen Application Patterns

The research performed analysis on differences of physiological property and yield of Tiejing No. 11 by different nitrogen fertilization patterns. The results indicated that while the nitrogen of basal: tillering: panicle was 6 ∶3∶1, the higher amount of nitrogen improved the chlorophyll content, photosynthetic capacity, effective panicle, grain weight and yield; the medium nitrogen level had advantage under the ratio 4:3:3; nitrogen application at lategrowth stage was suitable for low or medium nitrogen level,which could increase photosynthetic capacity and optimize the yield components and increase yield; under the same ratio for basic tiller and ear fertilizer, the increase of nitrogen could improve total nitrogen uptake and protein content, decrease nitrogen physiological efficiency and milled rice and tasting, but nitrogen recovery and harvest index changes had difference; as application at late growth stage in same nitrogen rate, total nitrogen uptake and protein content increased, nitrogen physiological efficiency and milled rice and amylose content and tasting decreased, nitrogen recovery and harvest index increased under low or medium nitrogen level and decreased under high nitrogen level. Nitrogen application 210 kg/hm~2 and the ratio 4 ∶3 ∶3 of basal:tillering: panicle made the yield increase by 2.8%-11.3%, and this is the optimal mode of nitrogen fertilizer application.     

玉米秸秆碳氮比调控施用对烟叶氮磷钾吸收的影响

通过田间小区试验,研究玉米秸秆及调控碳氮比后施用对烤烟产量、产值及上、中、下部烟叶氮、磷、钾含量及累积吸收量的影响.结果表明,玉米秸秆调控碳氮比后施用可显著提高烟叶产量、产值;同时促进烟叶氮、钾吸收,尤其是利用油枯、苕子等高氮生物质材料与玉米秸秆进行调节碳氮比后施用效果更好;与玉米秸秆单独施用相比,玉米秸秆+苕子、玉米秸秆+油枯、玉米秸秆+尿素进行调控碳氮比后施用,烟叶产量分别提高11.53％、9.49％、3.73％,烟叶氮含量分别增加12.95％、4.80％、7.76％,氮总累积量分别增加26.15％、15.02％、11.79％,烟叶钾含量分别增加4.11％、5.24％、7.79％,钾总累积量分别增加16.10％、15.23％、11.81％;但是,烟叶对磷的吸收却有一定程度降低,玉米秸秆单独施用导致烟叶产量、产值及养分吸收降低;因此,在烤烟生产中施用高碳氮比玉米秸秆,既要注意补充氮素来调节碳氮比,也要考虑补充磷素.     

桂阳烤烟田间不同栽培方式土壤速效养分动态变化

【研究目的】为了探明烤烟最佳栽培方式,明确不同栽培条件下土壤速效养分的变化动态差异,【方法】采用大田试验,对露地、地膜覆盖、稻草覆盖三种栽培方式下的土壤速效养分含量进行测定。【结果】结果表明:露地栽培符合烤烟的吸肥规律,但由于气温、水分等原因土壤养分含量较低;地膜覆盖碱解氮含量呈先降低后升高的趋势,与烤烟对氮素的吸收规律不符;覆盖稻草可以提高土壤养分含量,在烟株进入成熟期碱解氮含量呈平稳的下降趋势。【结论】虽然覆盖稻草有利于优质烤烟的生产,但还需要加强一些有效的栽培调控措施,使稻草覆盖成为优质烤烟生产更有利的栽培方式。     

干旱胁迫对苗期甘蔗叶片水分和叶绿素荧光参数的影响

[目的]研究干旱胁迫对甘蔗叶片水分和叶绿素荧光参数的影响,为甘蔗生产及评价研究提供依据.[方法]选取7个抗旱性不同的甘蔗品种,在苗期进行干旱胁迫,并测定胁迫条件下甘蔗叶片水分含量和叶绿素荧光参数的变化.[结果]甘蔗叶片水势和相对含水量与土壤相对含水量存在一定的内在联系,耐旱强的品种对土壤水分的利用率较高;相关分析和因子分析表明茁期干旱存活率、Fc/Fm、叶片水势和相对含水量可被用作抗旱性评价指标.[结论]水势表现为一个相对独立的影响因子,对甘蔗抗早性有支配作用,并验证了Fv/Fm作为甘蔗抗旱评价指标的可靠性. Abstract： [Objective] The aim was to explore the effects of water stress on leaf water and chlorophyll fluorescence parameters of sugarcane seedling,as well as to provide basis for the study on sugarcane production and evaluation.[Method]Seven different sugarcane varieties were studied at the seedling stage under drought stress,and the changes of leaf water and chlorophyll fluorescence parameters under stress conditions were detected. [Result] leaf water potential,leaf relative water content and soil relative water content showed a certain amount of internal relationship,the sugarcane varieties that had more tolerant to drought had higher utilization rate of soil water;the correlation analysis and factor analysis suggested that the survival rate at seedling stage under drought stress,Fv/Fm,leaf water potential and relative water content could be used as drought resistance evaluation indicators. [Conclusion] As a relatively independent influencing factor,water potential had dominating effect on drought resistance,and the reliability of Fv/Fm as drought resistance evaluation indicator had been verified.     

铅镉复合污染对水稻生长及产量的影响

[目的]探讨铅镉复合污染对水稻生长、产量及品质的伤害及机理.采用盆栽试验,研究了不同程度的铅镉复合污染对水稻生长发育及产量品质的影响.[结果]铅镉低浓度胁迫能够促进水稻生长,高浓度抑制水稻的株高;铅镉胁迫显著降低了水稻的分蘖数,随着胁迫浓度增加,分蘖数下降幅度增大;铅镉胁迫显著降低了水稻每盆穗数、结实率、千粒重和产量,低浓度胁迫下每穗总粒数显著增加,高浓度胁迫下每穗总粒数显著降低;铅镉低浓度胁迫下糙米绿和精米率显著增加,高浓度胁迫下糙米率和精米率显著降低,整精米率随处理浓度的增加而显著下降;水稻籽粒中铅镉含量与土壤中铅镉浓度成显著正相关,土壤铅镉含量达到中高浓度时,水稻籽粒铅镉含量严重超标,铅镉最高超标达333%和122%.[结论]该研究为污染地区水稻栽培技术体系的建立提供依据. Abstract： [Objective] The aim was to study the damage and the mechanism of combined pollution of Pb and Cd on rice growth,yield and quality of rice.[Method]Effects of combined pollution of Pb and Cd on the growth and yield of rice were studied by pot experiment with cultivating rice. [Result] Pb and Cd could promote dce growth at low concentration while inhibit plant height at high concentration;Pb and Cd stress reduced the number of rice tillers significantly,with the increasing of stress concentration,the decrease amplitude of the number of tillers was greater;the panicle per pot,seed setting rate,1000-grain weight and yield of rice were reduced significantly by Pb and Cd stress,the grain number per panicle decreased significantly under low concentration of Pb and Cd but increased significantly under high concentration;the brown rice rate and milled rice rate increased significantly under low concentration of Pb and Cd while at high concentration of Pb and Cd,the both two reduced significantly,the head milled rice rate reduced significantly with the decreasing of concentration;The Pb and Cd content of grains were significantly positively related to the concentrations of Pb and Cd content in soil,it had excessively exceeded hygienic standard when the concentrations of Pb and Cd in soil were medium-high and the unqualified rate reached 333% and 122%.[Condusion]The study had provided basis for the establishment of rice cultivation system in pollution areas.     

稻草还田对烟田速效养分变化及烟叶产量品质的影响

在湘南地区优质烟叶生产的土壤改良与培肥技术体系研究中,2006—2007年连续两年选用稻草还田方式,研究其改良土壤、培肥地力和提高烟叶产量、品质的作用,取得良好效果。稻草还田方法简单,资源丰富。整个烤烟生长期的土壤速效养分监测累计,碱解氮释放量,稻草翻压和覆盖分别比对照增加3.0%、1.3%;速效磷释放量分别增加11.1%、4.9%;速效钾释放量分别增加25.2%、5.7%。总的趋势以稻草翻压>稻草覆盖>CK,由此可知,稻草翻压效果优于稻草覆盖。烟叶产量结果统计,稻草还田对提高烟叶产量效果显著。其中,稻草翻压比对照平均增产12.0%,稻草覆盖比对照平均增产6.7%。且烟叶内在成分基本趋向合理,上、中等烟叶比例达90%以上。     

不同覆盖方式对植烟土壤温度和水分及烤烟品质的影响

不同覆盖方式的比较试验结果表明,秸秆与地膜双覆盖能够协调烤烟生长全过程的土壤温度,并且地温日变化幅度小,蓄水保墒作用显著。秸秆单覆盖对土壤性状改良与秸秆和地膜双覆盖相似,烟叶内在化学成分较协调,品质较高,但由于在烤烟生长前期不能提高土壤温度,使得烟叶生长速度较慢,产量下降;地膜单覆盖对土壤性状改良不及秸秆单覆盖和秸秆与地膜双覆盖,秸秆和地膜双覆盖使0￣20cm土层含水量平均比露地栽培提高16.82%,比秸秆单覆盖提高6.45%,比地膜单覆盖提高5.43%,而且烟叶成分较协调,产量与产值也较高。     

不同覆盖方式对植烟土壤有机质及烟叶品质影响的初步研究

为提高烟叶品质,进行了对植烟土壤不同覆盖方式的比较试验,结果表明:高C/N比秸秆与地膜双覆盖能够协调烤烟生长全过程的土壤温度,并且地温日变化幅度小,蓄水保墒作用显著,有机质积累明显,腐殖化作用强,使得烟叶内在化学成分比例更协调,产值高。秸秆单覆盖对土壤性状改良与秸秆和地膜双覆盖相似,烟叶内在化学成分较协调,品质较好,但由于在烤烟生长前期不能提高土壤温度,使得烟叶生长速度较慢,产量下降,产值与地膜单覆盖差异不显著;由于没有新鲜的有机质补充,地膜单覆盖对土壤性状改良不及秸秆单覆盖和秸秆与地膜双覆盖,从而使得烟叶品质较不协调,但产量较高,产值也较高。     

长期稻草还田对烟田土壤氮素矿化特征的影响

为探明稻草还田对烟田土壤氮素释放的影响,进而有效调控并为配套的施肥技术提供理论依据,采用室内培养和田间原位培养试验,研究了长期稻草还田对烟田土壤有机氮矿化特征和进程的影响。结果表明:稻草还田提高了土壤氮矿化潜力(N0值)和矿化速率(k0),连续还田5年土壤的N0值为92.11kg/hm2,比对照增加了23.78%;稻草还田促进了烟田土壤氮的矿化,烟株生长期内还田5年的土壤矿化氮量为94.94kg/hm2,比对照高17.67%。在烟株生长中后期,稻草还田的烟田表层土壤无机氮数量明显增加。稻草还田增加了土壤微生物量氮,移栽时,还田5年土壤微生物量氮比对照增加20.18%,采烤后则高出40.71%。稻草还田1年后土壤微生物量氮处于调整平衡阶段。长期实行稻草还田提高了烟田土壤氮供应能力,增加了上部烟叶全氮和烟碱含量过高的风险。     

基于蒙特卡洛多重积分的DNA动力学结构参数的计算

依据最新NDB数据库中蛋白质-DNA复合物晶体结构数据,基于修正的DNA结构统计力学模型,利用蒙特卡洛多重积分计算DNA动力学结构的有关参数,并对计算得到的结果进行时间复杂度和精确度分析. Abstract： Based on protein-DNA complex crystal structural data in up-to-date Nucleic Acid Database,the related parameters of DNA Kinetic Structure were investigated by Monte-Carlo Multiple Integrals on the base of modified DNA structure statistical mechanical model,and time complexity and precision were analyzed on the calculated results.