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近几年来,我局各农场逐步在积造有机肥和按计划种植绿肥的同时,大搞秸秆还田,收到了一定的效果。从1975年以来,全局秸秆还田220多万亩。据庆丰农场在连续两年玉米秸秆还田的地块调查,由于有机质增多,使土壤速效氮含量增加16～29ppm,耕层土壤容重降低0.04～0.09克/厘米~3,直径1～3毫米团粒多2.5%,产量提高9.4～17.3%。850农场一队通过采取秸秆还田及其它措施以改良土壤,增产效果显著。增产幅度为:小麦172斤/亩,大豆18.4
In recent years, all our farms have gradually built up organic fertilizers and planted green manure, and at the same time they brought in straw to the field and received certain results. Since 1975, more than 220 million mu of straw have been returned to the country. According to Qingfeng farm survey of corn stalks returned to the plots for two consecutive years, due to the increase of organic matter, the content of available nitrogen in soil increased by 16-29ppm, the tillage soil bulk density decreased by 0.04-0.09g / cm3, the diameter of 1-3mm Aggregate 2.5% more, yield increased 9.4 ~ 17.3%. 850 farm a team through the use of straw and other measures to improve the soil, yield significant results. Yield increase: wheat 172 kg / mu, soybean 18.4