论文部分内容阅读
近几年来,对农作物高产提出,长相指标化,测定仪表化,田间管理科学化,针对“三化”问题,我们对关中夏玉米亩产800斤以上应具备的土壤肥力、土壤水分及叶面积指标进行了如下探讨。一、土壤肥力指标 1976年在扶风县揉谷公社12块地进行高产栽培试验,每块选用1—2亩,实收面积0.5—1亩。品种陕单1号,每亩3000株。播期6月8—12日。亩施标准氮肥70斤,宝鸡磷肥50斤。播前测定土壤有机质、速效氮、磷结果如表1。
In recent years, the crop yield, appearance indexization, instrumentation, scientific management of the field, for the “three” problem, we Guanzhong summer corn yield of 800 pounds or more should have soil fertility, soil moisture and leaf area Indicators were discussed as follows. I. Soil Fertility Index In 1976, 12 high-yielding cultivation experiments were carried out in 12 areas of Kwuyou Commune in Fufeng County, each of which had an area of 0.5-1 mu. Variety Shan Shan 1, 3000 per acre. Sowing June 8-12. Mushi standard fertilizer 70 kg, 50 kg of Baoji phosphate fertilizer. Sowing before determination of soil organic matter, available nitrogen, phosphorus results in Table 1.