| 摘要: |
| 1996～1997年在豫西褐土区进行了氮钾肥不同用量试验,探讨了高产条件下小麦的吸肥规律和施肥的增产效应。结果表明,小麦吸收养分的数量,在一定范围内与施肥量呈显著的正相关;吸收养分的高峰期是拔节期至抽穗期,一生吸收氮、磷、钾养分的数量分别为215. 4, 69. 4和218. 0 kg·hm-2,三者之比为3. 10∶1∶3. 14.氮钾肥的产量模型为:Y=3598. 6950+ 16. 6057X1+ 13. 5449X2-0. 0371X12-0. 0548X22+ 0. 0069X1X2,经济最佳施肥量为N 214. 8 kg·hm-2,K2O 126. 5 kg·hm-2,氮钾比为1. 69∶1,平均增产11. 8%. |
| 关键词: 氮钾配合，养分吸收，增产效应 |
| DOI： |
| 分类号:S158.3 |
| 基金项目:河南省科技攻关项目（921020101） |
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| Influence of Nitrogen and Potassium Fertilizers on Nutrient Assimilation of Wheat and Yield increase Effect |
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| Abstract: |
| Between 1996～1997,we made an experiment of N and K-fertilizers with
different quantities at the grey area in western Henan Province.The law of assimlation
and the effect of wheat yield increase was discussed.The result indicates that there are
notable relationships between the quantity of nutrient assimilation and the quantity of
the fertilizer in a certain limit. The quantity of wheat assimilating nutrient is from the
joining stage to earemergence stage.The quantities of the wheat assimilating nutrient of
N、P and K are 215. 4, 69. 4 and 218. 8 kg per hectar respectively.The proportion of N、P
and K is 3. 10∶1∶3. 14.The yield model of the N and K fertilizers is Y= 3598. 695+
16. 6057x1+ 13. 5449x2-0. 037x12-0. 0548x22+ 0. 0069x1x2,The economical and reasonable quantities of N and K fertilizers application are 214. 8 kg and 126. 5 kg per hectar
respectively and the proportion of N and K is 1. 69∶1.The yield of wheat is averagely
increased by 11. 8% by average. |
| Key words: nitrogen and potassium fertilizer cooperating,assimilation of nutrient,effect of increasing yield |
