论文部分内容阅读
农作物所需的养分,主要来源于土壤和肥料。施肥不当,肥效降低,肥料报酬小。采用“因地定产,计划用肥”,可以克服施肥上的盲目性,充分发挥土壤养分的增产作用,做到合理施肥,均衡增产,提高产量,降低成本。西北农学院土壤营养诊断课题组和武功马江公社协作,首先,通过普查和试验示范找出土壤养分、施肥与小麦产量的关系。在当地条件下,初步确定:(1) 土壤肥力基础不高时,增施肥料,小麦增产效果显著。据试验统计,在平常年份,土壤速效磷含量
The nutrients needed for crops come mainly from soils and fertilizers. Improper fertilization, lower fertilizer efficiency, small fertilizer. Adopting the principle of “local production and planned utilization of fertilizer” can overcome the blindness of fertilization, give full play to the role of increasing production of soil nutrients, achieve rational fertilization, balance production, raise output and reduce costs. Northwest Agricultural College soil nutrition diagnosis group and the Komagongjiang commune collaboration, first of all, through census and pilot demonstration to find out the relationship between soil nutrients, fertilization and wheat yield. Under local conditions, initially determined: (1) When the foundation of soil fertility is not high, increasing fertilization, wheat yield significantly. According to experimental statistics, in normal years, soil available phosphorus content