施影响

Two kinds of irrigation strategies, including irrigation up to field capacity and fixed amount based on soil texture, were employed with bubbler irrigation system.

结果表明，传统灌溉方式下，优化氮素处理保证了番茄产量，与传统氮肥处理相比，追施的氮肥数量减少了48%；在番茄的主要生育时期内，采用每次灌溉至田间持水量及固定灌额处理的灌溉量分别比传统灌溉处理减少46%和30%；采用同样指标所推荐的氮肥追施数量也分别减少14%和10%，明显减少土壤–蔬菜体系中氮素的表观损失，减轻了由于过量施氮而对环境造成的影响。

The effect of different agronomic measures No topping(T1),Topping(T2),Topping+K-2SO-4(T3),Topping+Applying IAA 1 time(T4),Topping+K-2SO-4+ Applying IAA 1 time(T5),Topping+K-2SO-4+Applying IAA 2 times(T6) on chromoplast pigment and its degraded products content in flue-cured tobacco leaf was studied.

研究了不打顶(T1)、打顶(T2)、打顶+追施K2SO4(T3)、打顶+涂抹生长素1次(T4)、打顶+追施K2SO4+涂抹生长素1次(T5)、打顶+追施K2SO4+涂抹生长素2次(T6)6种调控措施对大田期烤烟叶片质体色素含量及其调制后降解产物含量的影响。

The effects of four different fertilization patterns, no application of P, single application of chemical P fertilizer, cycling reuse of organic residues (rice straw, pig feces and green manure) and cycling reused of organic residues incorporated with chemical P, on Olsen-P in paddy soil, P content in grain and haulm of rice as well as the P uptake and accumulation at different growth durations of rice were studied using the samples taken from a long-term experiment field of the Taoyuan Station of Agro-ecosystem Observation, Chinese Academy of Sciences.

采用动态采样结合室内分析方法，比较研究了中国科学院桃源农业生态实验站的长期田间定位试验中长期施与不施磷肥、有机物料循环再利用和在有机物料循环再利用的基础上配施磷肥等几种施肥模式对土壤Olsen-P含量、水稻不同生育期茎叶和子实磷含量、以及各生育期累积吸收和利用磷的影响。

Results showed that spraying KCl solution every other day for 15 days from late flowering decreased nitrate content in the leaf and stem, promoted nitrogen redistributed to silique, increased nitrate reductase activity in the leaf. After spraying 1% KCl solution does not affect the fresh weight of rapeseed. And more obvious differences between the species, different varieties of the same deal with the differences between the more significant.

结果表明，喷施氯化钾溶液能有效降低油菜茎叶硝酸盐含量，与喷施硫酸钾溶液和清水相比达到了显著水平；有效促进了氮素向角果分配；喷施氯化钾还可以增强叶片硝酸还原酶的活性，但不影响喷洒后采样时油菜总的鲜质量；而且品种之间处理后的差异比较明显，同一品种不同处理之间的差异也比较显著。

This research was conducted to determine the effects of nitrogen fertilizer rate and ratio of base and topdressing fertilizer on wheatTriticum aestivum L.

应用15N标记技术研究高产麦田中施氮量和底施与追施氮肥比例对冬小麦籽粒产量、氮肥利用及土壤残留和损失的影响。

A field experiment using OTC(open-top chamber)was carried out with treatments different in nitrogen supply0, 5, 15 gm^(-2 and CO2 level 350 vs 700 μmolmol^(-1 to investigate effects of the treatments on biomass and root/shoot ratio of Calamagrostis angustifolia.

利用开顶箱薰气室(open-top chamber)试验装置，研究了不施氮、施常氮MN， 5gm^(-2和施高氮HN， 15gm^(-23个氮素水平下大气CO2浓度升高对小叶章生物量和根冠比的影响。

The experiment studied the effects of applying different amount of B and Zn to peanuts growth, development and yield. The results showed that by supplying rational micro-fertilizer of Boron and zinc, the growth and development of the first pair cotyledonary branch, root nodules leaves and pods could be promoted, the yield was significantly increased on the basis of supplying rational Nitrogen, Phosphorus and Potassium. In this experiment, supplying Boron 7.5 kg/hm^2 and 11.25 kg/hm^2 could increase by 6.87% and 8.19% in comparison with CK, supplying Zinc 7.5 kg/hm^2 and 11.25 kg/hm^2 could increase by 7.17% and 5.20% in comparison with CK.

采用大田试验研究了增施不同量硼、锌微肥对花生生长发育和产量的影响，结果表明，在合理施用氮、磷、钾肥的基础上，适量配合施用硼、锌微肥可以明显促进花生一生的生长发育，增加花生第一对侧枝长、单株根瘤、叶片和荚果数等，显著提高花生产量，其中增施硼肥7.5和11.25 kg/hm^2的处理比较对照分别增产6.87和8.19%，增施锌肥7.5和11.25 kg/hm^2的处理比较对照分别增产7.17和5.20%。

Density and sowing date on the yield characters of weak gluten wheat Vannai 48 were investigated with multiquadratic orthogonal rotational regressive design.

方法］采用多元二次正交旋转回归设计研究不同施氮量、施钾量、施磷量、密度和播期对弱筋小麦皖麦48产量性状的影响。

Inwheat intercropped with soybean not only N situation could be improved butalso P situation could be.2In intercropping,the pH of soybean rhizospherewas decreased by increasing the R-Apase activity,which could decelerate thetransforming and fixing P fertilizer.3In both monoculture and intercroppingsystem,the soil pH of rhizosphere was affected by cropping system at two Plevel which only 0.1-4mm distance from the root surface,but the effect of S-Apase activity in the rhizospher soil by cropping system was less than3mm.In effect,the rhizosphere P was really available nutrient,and applyingP to rhizosphere was effective ways to reduce the P nutrient competition.4Inwheat/soybean intercropping,the peak stage of reduction ability of roots wasthe same as that of the root growth,so that the time compensation appearedin intensity of nutrient absorption.

间套作大豆、小麦、玉米根系Apase的差异又反映出大豆利用土壤磷的潜在能力最大，而玉米最小，可见禾谷类的小麦与大豆间套后不但能改善小麦的氮素营养状况还使磷素营养也得以好转。2）间套大豆根际pH值的下降，导致磷肥施入土壤后形成〓-P的比例显著提高，转化成〓-P等难溶性磷减少，说明间套的大豆能减缓肥料磷在土壤中的转化和固定，减少磷素向无效化方向转化。3）复合群体根际土壤pH值的影响一般只发生在0.1-4mm的根际微区，而土壤磷酸酶的影响供磷与否在距根表3mm以外都无多大差异，说明根际磷才是真正有效磷，根际施磷是解决磷素竞争的有效途径。4）。

Cv. Nipponbare was grown hydroponically to study the effect of different Si application methods on dry weight of plants with or without inoculation, and the effect of Si addition or not on key enzyme activities and the resistance to Xoo after inoculation.

cv。 Nipponbare为材料，在水培条件下，研究接种白叶枯病菌、施硅对水稻干物质累积的影响；接种病菌条件下，施硅与否对水稻叶片关键酶活性的影响及其与水稻白叶枯病抗性的关系。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。