摘要
通过测定不同生育期不同深度土壤中速效磷的含量,研究在不同水肥条件下土壤中速效磷的变化规律,为确定合理的灌水定额和合理的施肥方式提供理论依据和技术参数。结果表明:在幼果生长期需要的速效磷最多,在开花发芽期需要的较少;在灌水量为8 400m3/hm2和施肥量为1 104kg/hm2时,磷肥发挥的效益最好。
Through measuring the content of rapid available phosphorus of soil in different depth and different growth stages, the change law of rapid available phosphorus in soil under different water and fertilizer conditions is studied to supply the theoretic base and technical parameters for the determination of reasonable irrigation quota and fertilization way. The result shows that the rapid a- vailable phosphorus needed in young fruit growing season is the highest, and that needed in flowering and sprout stage is less. The benefit of phosphate is the best under the condition of 8 400 m3/hm2 iriqgation amount and 1 104 kg/hm2 fertilizing amount.
出处
《节水灌溉》
北大核心
2013年第3期1-4,共4页
Water Saving Irrigation
基金
水利部公益性行业专项经费项目(201101050)
关键词
畦灌
速效磷
不同水肥条件
border irrigation
rapid available phosphorus
different water and fertilizer conditions
