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棉花发育规律,及其与外界环境条件的统一,是人们从事棉花生产,夺取高产,必须遵循的原则.我们于1978年进行了高产棉花生育性状和一些生理特性的初步研究,以期总结出高产棉花生育规律,为改进栽培技术提供理论依据.现将试验结果整理分析如下: 一、试验经过试验田为淮北黑土,肥力水平:有机质含量1.02%,全氮0.078%,速效磷6.35PPM,速效钾158PPM,PH值8.45.前茬大豆,冬季机耕冻垡.3月下旬深翻一尺左右每亩施入腐熟猪圈粪2000斤,过磷酸钙(含P_2O_58.9%)200斤,4月上旬每亩又施人粪尿3000斤,猪圈粪4000斤,浅翻入土中,做到分层施肥.氮磷钾三要素的比例为3:2:1,其中总氮量:基肥占40%,追肥占60%.
The law of cotton development and its unification with the external environmental conditions are the principles that people must follow to engage in cotton production and seize high yield.We conducted a preliminary study on the fertility traits and some physiological characteristics of high yield cotton in 1978 in order to conclude that high yielding cotton Fertility level: organic matter content 1.02%, total nitrogen 0.078%, available phosphorus 6.35PPM, available potassium 158PPM, potassium fertilizers, PH value of 8.45. Precursor soybean, winter tillage .In late March about a foot deep conversion per acre into the rotten pigpen 2000 kg, superphosphate (including P_2O_58.9%) 200 pounds, in early April per acre Also put manure urine 3000 pounds, pig pound 4,000 pounds, shallow turn into the soil, so stratified fertilization .NPK three elements of the ratio of 3: 2: 1, of which total nitrogen: 40% of basal fertilizer, top dressing Accounting for 60%.