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毛竹笋材两用林配方施肥效应研究 总被引:6,自引:2,他引:4
对毛竹笋材两用林的配方施肥试验结果表明,施肥区的笋材产量与不施肥区相比有明显增加。施用4种肥料3a累计平均净增产鲜竹材6603.3kg/hm^2、鲜竹笋544kg/hm^2。每公斤肥料(按有效成分N,P,K计算)年均净增产竹材7.7kg、鲜笋0.64kg。最佳施肥配方为A2B1C2D3,即每公顷施菜子饼1125kg,N肥150kg,P肥56.3kg,K肥75kg。其影响次序为A>C>D>B。使用这个配方竹林生产力量高,其中年均产竹材21.96t/hm^2、竹笋1.65t/hm^2,收入1.074万元/hm^2。 相似文献
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目前,枣树配方施肥的研究成果多以“每产 100kg鲜枣需施 N、 P2O5、 K2O各多少 kg”的“配方标准”形式表达。由于我国幅员辽阔,各地土壤、肥料情况差别很大,枣农及一些农技推广人员对这类“配方标准”如何精确地转化为符合当地实际的肥料组合,尚不明确。本文提出此类配方标准在实际工作中的精确应用方法,既可作为枣树配方施肥的一种推广思路,又可作为枣树施肥管理电脑化的理论基础。 1配方标准的选择修正 1. 1可供选择的配方标准:河北农大根据 70年代中期河北、山东的枣树丰产试验田 (每 667m2年产鲜枣 1500kg以上 )的施肥经验推… 相似文献
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基质硒含量对棘托竹荪菌丝生长及其谷胱甘肽过氧化酶活性的影响 总被引:2,自引:2,他引:0
通过菌袋培养棘托竹荪试验,对比了不同基质硒含量对菌丝体生长速度及其谷胱甘肽过氧化酶活性的影响。结果表明,采用改良的基质配方比用传统生产常规的木糠加麦麸配方的菌丝生长速度可增加15.9%,在传统配方基质培养下,菌丝体长至满袋的时间为85 d,而改良配方基质菌丝体满袋时间只需要70 d;用改良配方基质添加外源硒的含量在0.5~4.0 mg/kg时,可促进菌丝体的生长,最佳配方在1.5个月内菌丝体长至满袋;基质硒含量为1.0~2.0 mg/kg时,菌丝体生长最快,质量约1.8 kg的菌袋在培养时间为50 d时各个配方均能完全长满。在培养基质中添加适量的外源硒肥对提高棘托竹荪菌丝体先端谷胱甘肽过氧化物酶活性有显著作用。 相似文献
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油桐的生产现状及其发展建议 总被引:32,自引:6,他引:26
油桐是原产我国的世界著名的工业油料树种。油桐在我国16个省、市、自治区有栽培分布,栽培分布范围广,品种资源丰富,结实早,产量高。简单介绍了油桐的资源分布、栽培与利用及其栽培的优势,并提出把油桐生产列入国家生物质能源发展的范畴、把油桐生产列入“十一五”规划项目、开展油桐作为生物柴油使用的试验研究、恢复原来的油桐研究会、迅速搜集保存油桐种质资源等建议。 相似文献
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油桐是原产我国的重要工业油料树种,在我国南方15个省(区)都有栽培和分布。本文选择82个不同气候条件的产区县,先用主分量分析法,将18个气候属性因子(变量),缩减为6个新变量(主分量),再进行系统聚类分析,将全国油桐产区划分为3个气候区和7个亚区,以供布局油桐生产时参照。 相似文献
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吴章文 《中南林业科技大学学报(自然科学版)》1989,(2)
1986年4~8月,在油桐重点产区湖南、湖北5县12个地段65个测点,对油桐纯林内的太阳辐射分布进行观测研究,结果表明:油桐林内太阳辐射的垂直分布与树冠形状有关,塔形树冠内的太阳辐射分布均匀,到达量多;水平分布与树冠的方位和枝条的部位有关,南向方位或下坡方向所在方位的到达量多,枝条外端的到达量多;油桐叶片对太阳辐射的吸收率与品种有关,葡葡桐大于小米桐。 相似文献
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拟通过精馏法催化裂解工艺和酯化后处理工艺联用,制备低含氧量的替代柴油燃料油。采用自组装精馏法催化裂解反应装置,CaO催化剂,考察了催化裂解对裂解产物(裂解油)组分的影响,GC-MS和凝胶色谱分析显示:精馏法催化裂解工艺可有效控制裂解油的分子组成,降低平均相对分子质量。测定裂解产物的部分燃料油性能分别为:酸值59 mg/g,密度825 kg/m3、黏度4.07 mm2/s、热值41 kJ/g、冷凝点-43℃、冷滤点-22℃。裂解油经催化酯化后处理后,经FT-IR和GC-MS分析表明,其组成主要为碳链小于C24的烷烃、烯烃化合物,长链烃含量减少,C16以下的短链脂肪酸甲酯明显增多;酸值降至2.9 mg/g,羧酸含量显著降低,燃烧热值增大,进一步提高了燃料油品质和应用性能。 相似文献
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Nermin Gözükirmizi Kasım Bajroviç Zeliha İpekçi Melih Boydak Tahsin Akalp Korhan Tunçtaner Hülya Balkan Hulki Tanrıyar Mehmet Çalıkoėlu Tijen Oėraş Öznur Özden Mümtaz Tulukçu Turan Tank 《Journal of Forest Research》1998,3(2):123-126
Plant regeneration from 9 clones ofPopulus tremula representing diverse genotypes originated from Turkey, has been studied in different media, such as Murashige and Skoog’s
Medium (MS), Aspen Culture Medium (ACM) and Woody Plant Medium (WPM) with appropriate supplements of growth regulators. Regeneration
efficiency on WPM containing 1 mg/l zeatin using stem explantsin vitro, was higher than on MS and ACM. In this system, the time required for shoot regeneration was 2 weeks, which was shorter by
two weeks than that of previous reports. A strong genotype dependence was observed among the tested nine clones. The regeneration
system, we describe here, did not involve the callus phase and thus was less prone to somaclonal variation. When adventitious
microshoots were cultured on WPM supplemented with 0.5 mg/l or 2 mg/l indole-3-butyric acid (IBA), root formation was obtained after 1 week of culture. Adaptation of regenerated plantletsin vivo was 100%. This system for micropropagation ofPopulus tremula is expected to be suitable for studies on transformation of genes involved in lignin biosynthesis via modification of lignin
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This study was a part of the Project No. 62-02-001 TUBITAK-MAN-GMBAE named “Investigations on Biogenetically Develop Poplar
Clones as a Raw Material for Pulp and Paper Industry” and financially supported by General Management of Turkish Pulp and
Paper Mills. 相似文献
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以濒危果树野生欧洲李当年生新梢为外植体,进行组织培养研究.以期筛选出最优培养基配方及培养程序.结果表明:野生欧洲李初代培养时,以Bs为基本培养基优于MS培养基;培养基中添加一定量激素的外植体生长势明显优于不添加激素;以B5为基本培养基,6-BA质量浓度0.5~1.0 rag/L,并添加一定量的生长素(IBA、NAA)效果较优,能较快启动生长反应,并初步形成一定的增殖率;芽增殖培养阶段,6-BA质量浓度为0.5~I.0mg/L时,以NAA为生长素,NAA和6-BA适宜的比例为1·(1-3),以IBA为生长素,IBA和6-BA适宜的比例为1:(3~5)较适宜. 相似文献
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The anti-diarrheal activity of methanol extract of dried bark and aerial parts of Litsea polyantha (MELP) has been evaluated in mice using different models (castor oil-induced diarrhea and propulsive gut motility in mice). MELP (50, 75, 100 mg/kg, p.o.) significantly (P<0.01) reduced the onset of diarrhea, fecal excretion and also showed a significant (P<0.001) reduction in gastrointestinal motility on charcoal meal test in mice. The results of the study support the folklore use of the plant for diarrheal remedies. 相似文献
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The influence of woodland soil bulk density on the growth and distribution of fine root system of main planting tree species
in the Weibei Loess Plateau was investigated by means of pot culture and field survey. Results indicated that in the woodland
of Pinus tabulaeformis, soil bulk density increased with the depth at different sites, while in the woodland of Robinia pseudoacacia, soil bulk density was higher than that in P. tabulaeformis, and there was no clear difference across the profile. Further analysis implied that there existed negative correlations
between soil bulk density and fine root length in the woodland of P. tabulaeformis. Results from pot culture indicated that although the effects of pot culture media on the fine root growth and development
of different tree species seedlings were different, all treated seedlings grew better in the soil matter with medium bulk
density and porosity and with the biggest biomass. Bulk density of pot culture media had clear effects on the growth and development
of P. tabulaeformis and R. pseudoacacia seedling roots, especially on the former, whereas it had little effect on that of Platycladus orientalis and Prunus armeniaca var. ansu, whose fine root biomass changed little in different pot culture media.
Translated from Scientia Silvae Sinicae, 2004, 40(5) (in Chinese) 相似文献