摘要
试验结果表明:杂交水稻每公顷施用K2O135kg时产量最高,达7735kg/hm2,比对照(NPK0)增产12 1%。钾肥经济效益也以每公顷施K2O135kg最高,比对照增收1008元/hm2,产投比为3 3∶1。钾肥施用量在K2O180kg/hm2以下时,土壤中的钾素亏损,不能保持土壤中钾素平衡。
The results of the experiment indicated that hybrid rice can obtain the highest yield and the best economic performance as potassium application was 135 kg/hm^2. The highest yield of hybrid rice reached 7735 kg/hm^2 and increased by 12.1% than CK. The income was raised about 1008 yuan/hm^2 and the value cost ratio reached 3.3∶1. The results also showed that potassium content in the soil decreased and can not keep balance when the K fertilizer was applicated under 180 kg/hm^2.
出处
《土壤肥料》
CSCD
北大核心
2005年第3期36-38,共3页
Soils and Fertilizers
基金
国际钾肥研究所(IPI)资助项目。
关键词
水稻
钾肥施用量
钾素平衡
hybrid rice
application of potassium
balance of potassium
