The effects of Cu on rice at same level of N fertilizer were studied.
本文研究了微量元素铜在同样的氮肥量水平下对水稻生育的影响。
Over-use N fertilizer may not only cause economic losses, but produce many environmental problems.
过量的施用氮肥，不仅造成大量的经济损失，更重要的是引起一系列环境问题。
The aftereffect of fertilization on the yield: N fertilizer had little effect on yield of alfalfa in the second year.
钾肥对第二年苜蓿还是有一定的作用，具有一定的后效。
The more developed the wheat roots were, the less leachate could be collected, thus, less loss of N fertilizer was observed.
小麦根系越发达，收集到的淋溶液越少，损失的肥料N越少。
Application of N fertilizer significantly increased the amount of residual nitrate-N, and affected its distribution in the soil profile.
施用氮肥可明显增加土壤硝态氮残留数量，并影响其剖面分布；
The influence of application of organic and nitrogen fertilizer on the content of alkali hydrolysable N in fertilities soil was studied.
对设施土壤中长期施有机肥与氮肥对土壤中碱解氮含量的影响进行了研究。
The effect of different N fertilizer forms on plant iron nutrition and the role of iron in plant N metabolism were studied under nutrient condition.
水培条件下研究了不同形态氮素对植物铁素营养的影响，以及铁对植物氮素代谢的影响。
To apply all the N fertilizer in jointing stage gave best results. The combined application of N and K can increase yield by 42.2%, and N only 25.9%.
另外，增产效果与氮肥施用时期有关，在拔节期一次施氮效果最好，氮钾配施增产42 ．2 ％ ，单施氮增产25 ．9 ％ 。
However, the contents of NH4 + -n in the Purplish clayey soil were significantly increased by water-logged incubation or by nitrogen fertilizer added.
而外加氮源或淹水处理对青紫泥nh4 +- N含量的提升作用则贯穿于培养试验的全过程。
The main results were as follows: there was a close relationship between the effect of Mo fertilizer application and N fertilizer levels, and Mo value.
结果表明：小麦施钼效果与施N水平和土壤钼值密切相关，而与土壤有效钼含量相关不显著。
The results showed that N fertilizer could improve the nutrition quality of wheat, increase paste strength and flexibility, but decrease paste ductibility.
试验结果表明：施用氮素化肥能明显改良小麦品质，提高小麦营养品质，增强面团强度和筋力，降低面团的延展性；
The amount of K increased observably with the increasing of N fertilizer application, but increased indistinctively with the increasing of K fertilizer in each organ.
各器官的钾素积累量随施氮量的增加而增加的幅度较大，但随钾肥用量的增加而增加的幅度较小。
Leaf N/ chlorophyll content and SPAD value increased with the increasing N fertilizer, and the lower leaves were more sensitive to the soil N supply than the upper leaves.
下位叶比上位叶对土壤氮的供应状况更为敏感，随着施氮量的增加，水稻叶片氮素含量、叶绿素含量、SPAD值相应的增加，而下位叶的增幅更明显。
The phosphorus fertilizer is the main restricted factor that the wheat (Jimai20) yield improves. Application of P and N fertilizer could obviously increase the wheat yield.
即在本试验条件下磷肥是济麦20产量提高的主要限制性因素，增施磷肥、适量施用氮肥可以提高其产量。
The results are as follows: N fertilizer was the major factor on the number of leaf, fibrous root, and the fresh weight of root and leaf, K fertilizer and P fertilizer then followed.
结果表明：影响知母叶片数、须根数、根茎鲜重和叶片鲜重的主要因子是N肥，其次是K肥和P肥；
Mathematic models between yield and N fertilizer and plant density for two peanut variety types were set up by using quadratic saturation D-optimization design under single-seed planting.
采用二次饱和D—最优设计建立了精播条件下不同类型花生品种N肥用量和密度与产量的数学模型，探讨肥料与密度的产量效应及优化配置。
The results show that yield increase effect and economic benefit of controlled release N fertilizer application decrease in lower, medium and higher fertility paddy soils in proper order.
结果表明：在较低、中等和较高肥力稻田上，施用控释氮肥的增产效果和经济效益依次递减；
Without N fertilizer for years, it will strain synthesis of chlorophyll in maize leaf, and it will go against the synthesise of organic matter. N fertilizer is in favor of the widening o…
长期不施用氮肥会使玉米叶片内叶绿素的形成受到限制，不利于有机物质的合成；
To investigate the changes of soil hydrolase activities under application of corn straws with manure, N and P fertilizer, a field experiment was conducted.
通过田间试验，进行了玉米秸秆与厩肥、N肥和P肥配合施入农田后土壤中水解类酶活性变化的研究。
The results indicate that the nitrate-N leakage loss under the root zone caused by fertilizer irrigation could creat the pollution of shallow groundwater in Tangshan agricultural area.
计算结果表明，唐山农业区灌溉施肥引起根区以下硝态氮渗漏损失可造成浅层地下水的污染。
There was very little fertilizer N residue left, most of which entered the organo-mineral complex, while a part of the soil N was activated.
化肥氮残留很少，大部分进入土壤有机无机复合体中，而部分土壤氮被活化。
Organic-inorganic granular fertilizer made of chicken manure powder plus N, P, K chemical fertilizers and microelements B, Zn, Mn, et al.
利用鸡粪为主体原料配以N、P、K化学肥料和硼、锌、锰等微量元素制成便于贮藏、运输和使用的有机-无机颗粒肥。
The relationship between incidence of fusarium wilt in chilly and the amount and preparation of N. P. K fertilizer was studied on the bases of soil chemical analysis.
在土壤化学分析的基础上研究分析用不同n、P、K配方施肥与辣椒枯萎病发生的关系。
The results showed that the efficiency of fertilizer N used by wheat increased and a higher percentage of N absorbed was translocated into grain under the interplanting condition.
结果表明，麦棉套作条件下，小麦对肥料氮的吸收和利用率显著提高，且所吸收的氮素较多地分配到籽粒中。
Field experiment was carried out in Guanzhong area, Shaaxi province using Capsicum as indicator, to study Capsicum to fertilizer effect reaction of n, p, K fertilizer.
在陕西省关中土娄土区布置线辣椒缺素大田试验，研究线辣椒对氮、磷、钾肥的肥效反应。
The relationship between yield and fertilizer application was studied by means of "3414" method under different amounts of N, P and K applied .
采用“3414”试验方法研究了油菜在不同氮、磷、钾肥施用量组合下，油菜产量与施肥的关系，应用回归效应方程寻找最优施肥量组合。
The sequence of the model factor effects (N>K>P) and the relation between high yield and fertilizer application, and the mutual functions among the yield factors of various fertilizers.
明确了模型因素效应顺序（氮肥＞钾肥＞磷肥）和高产与施肥的关系，以及各肥料产量因素间的交互作用效应。
The nurture role of different fertilizer application strategies was discussed by the measurements of the C and N dynamic of soil microbial biomass in wheat field.
通过测定不同施肥制度下小麦土壤微生物量C、N的动态变化，探讨了不同施肥制度对小麦土壤的培肥效应。
The nurture role of different fertilizer application strategies was discussed by the measurements of the C and N dynamic of soil microbial biomass in wheat field.
通过测定不同施肥制度下小麦土壤微生物量C、N的动态变化，探讨了不同施肥制度对小麦土壤的培肥效应。
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