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在毕业实习中,我们普查了辽宁省东方红农场的土壤,还特意采集了东风分场八户社员自留地土壤的混合样品。化学分析结果,大田土壤和自留地土壤有机质含量分别为2.05％和4.47％,碱解氮为90.2ppm和154.3ppm,速效磷为9.6ppm和171.6ppm,速效钾为125ppm和406.2ppm,这些数据说明自留地土壤养分要比大田土壤高得多。经调查得知,自留地平均单产粮谷可达1,200斤左右,而大田平均单产仅为前者的一半。这说明两个问题:第一,东风分场的棕黄土生产潜力很大,只要精心培肥,产量可以
During the graduation internship, we census the soil of Dongfanghong Farm in Liaoning Province and specially collected the mixed samples of the soil from the eight households of Dongfeng Branch. The results of chemical analysis showed that the soil organic matter content of the soil and the retained soil were 2.05% and 4.47% respectively, the alkali hydrolysis nitrogen was 90.2ppm and 154.3ppm, the available phosphorus was 9.6ppm and 171.6ppm, the available potassium was 125ppm and 406.2ppm, Soil nutrients are much higher than field soil. According to the survey, the average grain yield of the reserved plots can reach about 1,200 kg, while the average yield of the fields is only half of that of the former. This shows two issues: First, the production potential of brown loess in the east wind sub-sector is great. As long as the fertilizers are carefully cultivated, the output can be