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1988～1990年进行了旱地春小麦叶面喷施磷酸二氢钾效果研究,结果表明:不同处理对有效小穗、穗粒数、千粒重等产量构成因素有一定影响,与对照相比有增有减,增减幅度不大。浓度试验增减产率分别为0.84%～6.83%和1.24%～2.58%;时期试验增减产率分别为1.60%～20.6%和5.4%～9.0%。春小麦叶面喷施磷酸二氢钾技术需要区别情况对待:在土壤速效磷含量为3～5ppm的低磷土壤上,叶面喷施效果有待进一步验证;速效磷含量在5～10ppm的土壤上,可作为辅助措施;速效磷含量在15～20ppm,连年施磷和农家肥的地块不喷施。
From 1988 to 1990, the effect of foliar application of potassium dihydrogen phosphate on dry land spring wheat was studied. The results showed that different treatments affected the yield components of effective spikelets, grains per spike, and 1000-grain weight, increased or decreased compared with the control , Little increase or decrease. The increase and decrease rates of concentration test were 0.84% ~ 6.83% and 1.24% ~ 2.58%, respectively. The increase and decrease rates of the experiment were 1.60% -20.6% and 5.4% -9.0% respectively. Spraying diatomaceous earth with potassium dihydrogenphosphate in spring wheat leaves needs to be treated differently. The effect of foliar spraying on low phosphorus soil with soil available phosphorus content of 3 ~ 5ppm needs to be further verified. The available phosphorus content is in the range of 5 ~ 10ppm, Can be used as ancillary measures; Available phosphorus content of 15 ~ 20ppm, perennial phosphorus and farmyard plots are not sprayed.