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据研究,在500kg的产量水平下,农作物产量的59.3％来自土壤的基础肥力,肥料效果只占40％。我省是一个农业大省,人均耕地面积目前已由解放初的2. 8亩锐减到不足1.2亩,而可垦荒地资源又十分有限,到本世纪末,要承载9700万人口,使粮食总产达到3800万t以上,完成新增产粮食50亿kg的任务。这在很大程度上要靠培肥地力,提高单产和复种指数。增施有机肥料,增加土壤有机质含量是培肥地力不可缺的一项重要措施。英国洛桑试验站于上个世纪(1852年)设置了一组有机肥(厩肥)与化肥对比试验,到1969年的统计结果表明:有机肥与
According to the study, at the output level of 500kg, 59.3% of the crop yield comes from the basic fertility of the soil, with only 40% of the fertilizer effect. Our province is a big agricultural province. Per capita arable land area has been reduced sharply from 2.8 mu at the beginning of liberation to less than 1.2 mu. However, reclamation and reclamation of reclaimed land has very limited resources. By the end of this century, 97 million people should be borne so that the total grain Production reached more than 38 million t, the completion of the new grain production 5 billion kg of tasks. This depends to a large extent on fertilizing fertility and raising yields and multiplication indices. Adding organic fertilizer and increasing soil organic matter content is an indispensable measure for soil fertility. In the last century (1852), the Lausanne test station in Britain set up a comparative test of organic fertilizer (manure) and chemical fertilizers, and the statistical results from 1969 showed that: