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近年来,对于耕作制度的改革,较普遍注重采用间作套种,增加复种指数,强调当年增产,提高土地利用率,而忽略地力培养,持续增产,降低成本和便于田间作业的机械化。针对砂姜黑土僵、板、瘦的低产特点,为着进一步明确麦田轮作绿肥的适宜条件与效果,我们于1973年至1977年在山东省宁阳县乡饮公社进行了麦田轮作绿肥
In recent years, for the reform of the farming system, it has been more common to use intercropping and inter-cropping to increase the multivariate index. It emphasizes the increase of production and the improvement of land utilization in the current year, while ignoring the cultivation of geotechnical force, continuing to increase production, reducing costs and facilitating the mechanization of field operations. In order to further clarify the appropriate conditions and effects of crop rotation of green manure in response to the low yield of sagoaceous black soil, slab, slab and thin, we carried out crop rotation of green manure from 1973 to 1977 in Ningxiang County Township Commune of Shandong Province