去年,我们在土壤含有效磷小于5PPM的三熟制大麦田中,进行了缺磷土壤施用磷肥对大麦产量的关系试验,收到较好的增产效果。试验田土壤为白粉泥田,属潴育型水稻土,试验前进行土壤养分含量测定,含铵态氮15PPM,硝态氮15PPM,有效磷小于5PPM,有效钾25PPM,有机质2%,pH6。试验设 Last year, we conducted a trial on the relationship between phosphate fertilizer application and barley yield in phosphate-deficient soils in the three-cropping barley field containing less than 5 PPM of available phosphorus and receiving good yields. The soil in the experimental field is white paddy field, which belongs to the type of paddy-paddy soil. Before the experiment, the content of soil nutrient was determined, including 15PPM of ammonium nitrogen, 15PPM of nitrate nitrogen, 5PPM of available phosphorus, 25PPM of available potassium, 2% of organic matter and pH6. Test set