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。
On the basis of N and P fertilizers, application of the multiple element compound has positive effect on yield in the acid soils.
在氮、磷肥施用的基础上，配施富钾硅多元复合物与施纯硅肥、钾肥、钙镁肥一样，在酸性土壤上具有显著的增产效应；
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 influence of preparation conditions such as activated temperature and time on yield, specific surface area and adsorption behavior towards n-butane thiol was studied.
研究了聚丙烯腈基活性碳纤维的制备条件，如活化温度、活化时间对产品收率、比表面积及对正丁硫醇吸附与脱除性能的影响。
The effect of applying N-fertilizer or not in wheat on soil fertility and grain yield and fertilizer-N use efficiency (FNUE) of rice in the wheat-rice cropping system were studied.
通过对前茬作物小麦设置施用氮肥与不施用氮肥处理研究它对土壤肥力及后茬作物水稻产量和氮肥利用率的影响。
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。
In order to study the relationship between yield, maize ear treats and organ matter, N-OH, available P and K, we selected field block with different soil nutrition in Mei county, Shaanxi province.
在陕西眉县选择农田土壤养分含量不同的地块，研究不同含量的有机质，碱解氮、速效磷、速效钾与玉米果穗穗部性状及产量的关系。
Reduction of aldoses or ketoses yield sugar alcohols ,properly called ‘alditols,” HOCH2-(CHOH)n-CH2OH.
醛糖或酮糖被还原后变产生糖醇，确实的叫法为“多羟糖醇”（alditols），HOCH 2 -（CHOH）n-CH 2 OH。
A set of reciprocal introgressive line populations was used to study phenotypic index, physiological index and yield characteristic of rice under normal and low-N conditions.
同时利用一套双向导入系群体，分别在正常和低氮条件下考察相应形态指标、生理指标和产量性状。
Effects of different N-dosage applied and N-applying stages on grain protein content and protein components and yield were studied.
研究了不同施氮量和施氮时期对小麦籽粒蛋白质及组分含量和产量的影响。
Etiracetam was synthesized from 2-pyrrolidone by N-alkylation and aminolysis. The overall yield was 42.6%.
吡咯烷酮经N烷基化、氨解反应合成了乙拉西坦，总收率42.6%。
The H-N ratio in the production of synthetic ammonia is one of the most important parameters to increase the product yield which is an efficiency measure to keep the optimal production.
氢氮比是合成氨装置最为关键的参数之一，保持比值始终处于最佳状态是提高合成氨产量的有效措施。
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。
Title compound was synthesized from N-ethylaniline by hydroxyethylation, chloroethylation and quarternarization with short procedure and high yield, 70% aqueous solution was obtained.
采用N-乙基苯胺为原料，经羟乙基化、氯乙基化、季铵化合成本产品，此工艺步骤短，收率高，得到70％以上水溶液产品。
The effect of five N levels on root yield and sugar content and production of sugar was studied with one beet variety, in order to select the best N level for high yield and high sugar content.
本试验主要是研究同一甜菜品种在五种氮素水平处理下对甜菜的块根产量、含糖率、产糖量的影响，寻求获得高产高糖的最佳施用氮素水平。
A field experiment was conducted to analyse the dynamics of biomass yield and n, p, K absorption by maize under different planting systems.
采用田间小区试验方法研究了不同种植方式下玉米产量，干物质积累动态和养分吸收动态变化特点。
The growth and development, yield and quality, photosynthetic assimilation, and structure of Chieh-qua were affected by extraneous factors such as n, p, K nutrition and plant growth regulator.
营养和外源生长调节剂等外界环境因素对节瓜的生长发育、产量品质、光合同化及其解剖结构均有一定的影响。
By using "3414" fertilizer experiment method, the contents of n, p, K and yield of onion in Gaoqiao area were comprehensively analyzed.
试验采用二次回归“3414”完全方案设计，对高桥地区圆葱植株的氮、磷、钾含量及产量进行了分析。
Only the balanced supply of N, P and K could make the grape yield, quality and benefit best.
氮磷钾平衡施用才能使葡萄产量最高、品质最佳、效益较好；
The results of sandy culture showed that the dry weight of shoot and yield of biomass of DT and DTXC decreased under low-N, low-P, low-K stress.
砂培试验表明，在低氮、低磷、低钾胁迫下，东塘、东塘西侧地上部干重、生物学产量降低；
Methods the effects of amount of gallium sulfate, molar ratio of alcohol to acid, reaction time and repeated times of catalyst on the yield of n-butyl propionate were investigated.
方法考察硫酸镓用量、醇酸物质的量比、反应时间及催化剂重复使用次数等因素对收率的影响。
The effects of concentration of N-VP and light sensitive agent DMT in the grafting solutions and irradiation time on the grafting yield in acid and basic mediums were investigated.
测定了接枝率与接枝液中N-VP单体浓度、光照时间、催化剂浓度等条件的关系。
An optimized regression design with three factors and five levels was adopted to study the effects of n, K and s fertilizers on the yield and nitrate content of radish.
为使人们能够吃上健康的无公害食品，采用三因素五水平最优回归设计，探讨了氮钾硫配方施肥对黄泥土萝卜产量和硝酸盐含量的影响。
The effect of the planting density and the application amount of N-fertilizer on the yield and agronomical character of medium indica hybrid rice-liangyou 6326 were studied.
研究了不同施氮量和密度对杂交中籼两优6326产量及穗粒结构的影响。
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 amidocarbonylation reaction conditions were optimized and 66.4% isolated yield of racemic N-acetylleucine were obtained.
文中对酰胺羰基化反应条件进行了优化，分离得到消旋N-乙酰基亮氨酸产率为66.4%。
The influence of the molar ratio of n-amyl alcohol and acetic acid, the quantity of the catalyst, the reaction time etc on the ester yield was discussed.
探讨了醇酸物质的量比、催化剂用量、反应时间等因素对酯收率的影响。
A new technology for synthesis of N-acetyl-imidazolidone-2 as studied in this paper. The main factors which affect the yield of the product were discussed in detail.
研究了合成n—乙酰基—2—咪唑烷酮的新工艺，详细讨论了影响产品收率的主要因素。
The main content as follows:(1) The yields of optimized N fertilization treatment and conventional N fertilization treatment were no significant differences and all achieved target yield.
研究结果如下：（1）优化施氮处理的棉花产量和传统施氮处理相比无显著性差异，且都达到了目标产量；
An optimum regression design with three factors and five levels was adopted to find the effects of n, K and s fertilizers on the yield of Chinese cabbage and the nitrate content in its plant.
采用三因素五水平最优回归设计，研究了黄泥土配施氮钾硫肥对大白菜产量和硝酸盐含量的影响。
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