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利用回归设计对水稻钾、氮相互作用进行了多点的田间试验.结果表明,水稻产量与施钾量呈线性关系,与施氮量呈抛物线关系,适宜钾肥用量配以中氮用量的水稻产量最高.施中、高量钾时,其吸钾量与施氮量呈正比增加;随着钾、氮肥用量的增加水稻吸氮量均呈直线增加.当土壤施氮时,水稻对钾肥的利用率均随施钾量的增加而提高,水稻钾肥利用率达到最大值的土壤施钾量为每亩6.35公斤K_2O,相应的施氮量为每亩11.5kgN.水稻对氮素的利用率与施氮量呈抛物线相关,而与施钾量呈线性相关,水稻施用钾、氮肥对产量、养分吸收利用均表现出极显著的正交互作用.
A multi-point field experiment on the interaction between potassium and nitrogen in rice was carried out by using regression design.The results showed that there was a linear relationship between the yield of rice and the amount of applied potassium and a parabola relationship with the amount of nitrogen applied, The highest amount of potassium, when the amount of potassium, the amount of potassium absorption and nitrogen rate increased in direct proportion; with the increase of potassium and nitrogen fertilizer amount of rice showed a linear increase in nitrogen use.When the soil nitrogen, the use of potassium on potassium The rate of potassium application increased with the increase of potassium application rate. The potassium application rate of soil potassium up to the maximum of potassium fertilizer application rate was 6.35 kg K2O per acre and the corresponding nitrogen application rate was 11.5 kg N / There was a linear correlation between the amount of nitrogen and the amount of applied potassium. The application of potassium and nitrogen to rice showed a very significant positive interaction on yield and nutrient uptake and utilization.