论文部分内容阅读
钾素对喜钾作物如菸草、棉花、甜菜、橡胶、豆科作物等的增产效应及其作用早已明确。但钾对水稻的增产效应、在高产栽培中的重要生理作用及其钾肥的有效施用条件和施用技术等,近十余年来国内外研究较多,发展较快。一、钾素对水稻的增产效应及其原因分析近十余年来,世界各主要产稻区越来越多的试验表明水稻施钾有很大的增产效果。如印尼从1967—1976年的十年中,氮肥量增长10倍以上、磷肥量增长20倍左右,而钾肥则未增加,认为钾肥不是
The effects of potassium on the yield-increasing effects of hi potassium crops such as tobacco, cotton, sugar beet, rubber and leguminous crops have long been clear. However, the effect of potassium on rice yield, the important physiological role in high-yielding cultivation and the effective application conditions and application techniques of potash fertilizer have been studied more and more at home and abroad in recent ten years. First, the potassium effect on rice yield and its analysis of the past 10 years, the world’s major producing areas more and more experiments show that rice K has a large yield increase. For example, from the 1967-1976 decade in Indonesia, the amount of nitrogen fertilizer increased more than 10 times, and the amount of phosphorus fertilizer increased about 20 times, while that of potassium fertilizer did not increase. It was considered that potassium fertilizer was not