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耕作层土壤含速效P_2O_5 40mg/kg左右,施用磷肥对小麦的生长发育和产量没有显著影响,施磷只是维持或提高土壤中磷素营养的含量。耕作层土壤含速效P_2O_5 20~30mg/kg,施用磷肥对分蘖出现与生长、产量的高低均有显著影响,以持续高产和提高土壤肥力为前提,每666.7m~2施标准过磷酸钙50kg为宜。耕作层土壤含速效P_2O_5<10mg/kg,施用磷肥具有极显著的增产效果,在增施有机肥、氮肥条件下,每666.7m~2施标准过磷酸钙75kg,当季小麦产量可达400kg以上。研究成果可作为北方冬麦区、黄淮海冬麦区高产栽培参考。
Tillage layer soil with available P_2O_5 40mg / kg or so, application of phosphate fertilizer on wheat growth and yield did not have a significant impact, phosphorus is only to maintain or increase the content of phosphorus in soil nutrition. Tillage layer of soil with fast-acting P_2O_5 20 ~ 30mg / kg, the application of phosphorus fertilizer on the tiller emergence and growth, yield levels have a significant impact, to continue high yield and improve soil fertility as a prerequisite for every 666.7m ~ 2 application of standard superphosphate 50kg should. Under the conditions of increasing organic manure and nitrogen fertilizer, 75kg of standard superphosphate per 666.7m ~ 2 and the yield of wheat in the season up to 400kg . The research results can be used as high-yield cultivation reference for winter wheat area, Huang-Huai-Hai winter wheat area in northern China.