色彩旅游开发研究

在阐述目前国内旅游开发中色彩旅游品牌的打造及其影响和效果的基础上,指出了旅游中色彩因素研究的不足之处,并应用中国传统色彩文化和现代科学色彩理论建立了"色彩旅游"体系,挖掘了色彩旅游的资源条件,提出了色彩旅游产品设计步骤和现实中应注意的问题。     

肠结肠耶新氏菌毒力因子血清的研制及其特异性研究

致病性肠结肠耶新氏菌有与组织侵入性密切相关，由毒力质粒编码的、温度依赖的特异性外膜蛋白。用含有这种特异性外膜蛋白的毒力株免疫家兔，制备抗血清，经无毒衍生株吸收，即成毒力因子血清，用此血清做菌落凝集试验，检查了２６株各种来源、不同血清型的肠结肠耶新氏菌，其结果与ＶＷ－抗原测定、自凝性试验和毒力质粒检测的结果一致。     

微肥对玉米生长发育影响的探讨

针对黄淮海开发区博爱县南石润的土壤情况,作了B、Zn、Mn对玉米生长发育影响的对比实验,实验结果表明,Zn和Mn对促进其营养生长,提高其产量,增强其抗倒伏性有不同程度的显著效果。     

我国名优绿茶中无机元素含量及其现状分析

茶叶中一些无机元素对茶叶的品质具有重要作用，一些无机元素对人体健康有益。对2001年我国主要名优绿茶生产省的135只名优茶进行无机元素的含量分析表明，我国名优茶的无机元素含量较高，尤其是一些与茶叶品质有关元素如镁、锌、硫的含量较高，反映出我国名优茶品质总体良好，其中四川、贵州、云南省的名优茶无机元素含量较高。同时与浙江省的71只大宗茶的无机元素进行比较发现，名优茶中钾、磷、镁、锌的含量明显高于大宗茶，而大宗茶中钙、铁、锰、铝的含量高于名优茶。     

Trace elements in spinach (Spinacia oleracea) cultivated in soil fortified with graded levels of iron

Trace elements in two varieties of spinach cultivated in soil with different levels of added iron were determined. Addition of iron to soil decreased potassium, sodium and magnesium contents in spinach markedly (p<0.05), while the contents of zinc, manganese and copper in spinach were not significantly altered (p>0.05). Differential behaviour of spinach varieties was found in the zinc, manganese and sodium contents.     

EFFECTS OF BIOGAS SLURRY ON YIELD AND QUALITY OF OIL-SEED RAPE

Biogas slurry is a good source of plant nutrients and replacing chemical fertilizers with biogas slurry can not only achieve resource utilization of slurry, but also reduce the amount of fertilizer. In this study, biogas slurry was applied in the production of oil-seed rape, it was attempted to investigate the effects of slurry on yield and quality of rape, furthermore to find the optimum rate of biogas slurry. The results showed that the protein, iron (Fe), manganese (Mn), copper (Cu), and zinc (Zn) contents in rapeseed increased, the oleic acid, calcium (Ca) and magnesium (Mg) contents in rapeseed firstly increased and then decreased with the increased rate of slurry. Meanwhile, the erucic acid, glucosinolate and oil contents showed a tendency of decrease with the increased rate of slurry. When the rate of slurry was in the range of 78,750 kg hm^?2 to 101,250 kg hm^?2, the yield reached a relatively high level, which was in the range of 2817kg hm^?2 to 3433 kg hm^?2.     

Influence of organic amendments on Fe,Cu, Mn,and Zn availability and clay minerals of different soils

The effects of application of composted olive mill wastewater sludge (A) and depotassified sugarbeet vinasse (V) on total diethylenetriaminepentaacetic acid (DTPA) and sequential extracted micronutrients were investigated. The mineralogy of the fine fraction of soils was also studied. The soils used were a Typic Rhodoxeralf (soil R), a Typic Xeropsamment (soil S), and a Typic Xerorthent (soil C). Fertilization with A and V during 3 years, in general did not significantly affect the total concentration of Fe, Cu, Mn, and Zn versus the control. However, the elements extracted with DTPA generally increased with the organic amendments, more with A than with V. The BCR (European Community Bureau of Reference) sequential extraction indicated that the addition of organic matter generally increased Zn and Mn in the two more available fractions. A great amount of Fe was found in the second and third fractions from the unamended and amended soils. Nevertheless, the sum of the three fractions was enhanced for the organic amendment, except for calcareous soil. The distribution of these elements in the different fractions was significantly affected by the type of soil. The addition of both fertilizers caused modifications in particle size and consequence redistribution of the calcite content between the different fractions.     

Robustness in the mineral supply from temporary grasslands

Abstract

The current study examined the capacity of different temporary grassland legume–grass mixtures under different N supply levels to supply similar amounts of elements in systems where the herbage is cut for feed. Mixtures showed a good robustness in supplying equal amounts of mineral elements in the combined herbage as well as equal concentrations in dry matter of mineral elements compared with the same species in monocultures. The reasons for the mixed systems to be able to buffer differences in N supply levels as well as different compositions of the mixtures were that legume leaves and stems had similar concentrations of mineral elements, whether in monocultures or in mixtures with grasses. Grasses in mixture with legumes had however higher N, Ca, S, Zn, Cu and tended to have higher Mg concentration, both in stems and leaves, while Mn were less concentrated in mixtures’ dry matter. Further, the mixtures doubled their dry matter accumulation in the two weeks just around grass heading. The systems partly buffered the time-wise differences in the sense that the P accumulation paralleled dry matter but the N was diluted. This was mirrored in a decrease in N concentration and maintenance of the concentration level of P and other elements. As the stem–leaf ratio was higher (p<0.05) in festulolium than in ryegrass and as the stems of festulolium have lower concentrations of N, K, Ca, S, Mg, Fe and Cu than leaves, the mixtures including festulolium had a rapidly declining proportion of these elements in the combined mixtures’ dry matter. Management options in improving the mineral supplies are thus to choose species when establishing the temporary grasslands according to functionality, to manipulate the content of legumes by the N supply level, and to time the harvest of the herbage.     

阴山北麓木本植物区系研究

阴山北麓是典型的草原向荒漠的过渡区,由于其物种组成、植物群落结构以及生态功能上的特殊性,具有较为丰富的物种组成和复杂的植物区系。采用植物区系地理学的理论与方法,以实地调查为主,通过查阅相关文献,对阴山北麓木本植物区系组成、地理成分进行分析。研究表明:阴山北麓木本植物区系由16科38属68种植物组成。该区系木本植物≥10种的优势科有3科,含2种的属和含1种的属物种较为丰富多达31属,占区系植物总属数的81.58%。植物科分布包含5个分布型和1个分布变型,以世界分布型占优势。植物区系地理成分分布有11个分布型和4个分布变型,以温带分布型占主导地位。