《应用昆虫学报》 关键词褐飞虱， 水稻品种， 氮肥施用水平， 田间种群 [gap=2430]Key wordsNilaparvata lugens, rice variety, nitrogen fertilizer application rate, field population
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All over the world, increase the nitrogen fertilizer application rate is an important measure to increase maize production right now.
就目前全球情况而言，增加氮肥的施用量是提高玉米产量的一条重要措施。
The yield increase of K fertilizer was quite high at two rates of nitrogen application, and it closely relative to the content of available K in soil and potassium application rate.
钾肥的增产效率在两种氮肥水平下都较高，单位钾肥的增产量与土壤有效钾含量及施钾量呈极显著负相关；
The trial was established with a purpose to ascertain the yield response to Feiligao, a nitrogen fixation bacterial fertilizer, and its best application rate on tobacco.
为验证生物固氮菌肥肥力高的增产效果，探讨用于烤烟的最佳施用量，进行了试验。
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