平原高沙土有机质积累试验研究

Experiment and Research of the Organic Matter Accumulation of Plain Sandy Soil Area

研究了平原高沙土在保持1990年作物单产水平、保持一定单产增长率条件下,不同种植制度、不同培肥措施下的有机质消长规律,提出了提高土壤有机质的技术途径:优化种植制度不仅产量高,而且土壤理化性状得以改善;合理耕作可增加土壤黏粒含量,提高高沙土肥力水平;采用有机肥与无机肥相结合的培肥措施,通过稻麦留高茬和玉米秸秆还田,可直接提高土壤肥力;提高根茬产量,增加自然回归。

Based on the production experience and the results of experiments in plain sandy soil areas, the comprehensive techniques towards sustainable agriculture,i, e. developing multi-cropplng system, practicing rotating tillage, improving soil fertility with foliages or wheat and rice stubbles ,adopting labor-saving and high efficient cultivating techniques ,are suggested. It is of great significance to the sustainable agriculture development in lower or middle-yield regions.