【摘要】 为了研究控灌条件下水肥调控对黑土稻作产量的影响,通过盆栽试验,采用回归分析,建立水肥耦合数学模型。结果表明,整个生育期内氮肥和水对稻作的贡献较大;氮肥对稻作的产量增值存在正相关,而钾、磷肥及土壤相对含水率对水稻产量存在阈值反应;当产量最高时最佳施氮量为0.78g/盆,施钾量为0.45g/盆,施磷量为0.30g/盆,分蘖后期土壤相对含水率为71.5%,折合成公顷量为施氮量为110.46kg/hm2,施钾量为63.84kg/hm2,施磷量为42.20kg/hm2。更多还原

【Abstract】 In order to study the effects of regulation of water and fertilizer on rice yield,based on the experimental data collected from pot experiment,the regression analysis is conducted and the water and fertilizer coupling mathematical model is established.The results show that water and nitrogen fertilizer have greater effects on rice yield during the whole growth period.The rice yield is positive correlation to nitrogen fertilizer,while negative correlations to potassium,phosphate fertilizer and soil water content.The best fertilizer application quantity for the greatest rice yield is 0.78g/pot nitrogen,0.45g/pot potassium and 0.30g/pot phosphorus, which is equivalent to 110.46kg/hm2 nitrogen,63.84kg/hm2 potassium and 42.20kg/hm2 phosphorus,respectively.The soil water content for tiller late stage is 71.5%.更多还原