论文部分内容阅读
在山东省陵县重盐碱荒地连续进行了四年不同种植制度的改良效果试验。结果表明,在有灌排的条件下、棉花,小麦—玉米和小麦—田菁三种种植方式,以棉花的改土及经济效果最好,小麦—玉米结合秸秆还田次之,小麦—田菁虽有一定改土效果,但经济效果较差。秸秆还田的效果,麦秸还田不如玉米秸和田菁的改土培肥效果。棉花四年连作,如仅施少量有机肥,可使土壤容重增加,土壤有机质下降,因此提倡有机无机肥配合,利用和培肥相结合,其改良效果更佳。
In Ling County, Shandong Province heavy saline-alkali wasteland for four consecutive years of different planting system improvement effect test. The results showed that under the condition of irrigation and drainage, the cotton, wheat-corn and wheat-Sesbania cultivar had the best soil-modifying and economic effects, followed by wheat-corn combined with straw-returning and wheat- Although Jing certain soil improvement effect, but the economic effect is poor. The effect of straw returning, straw astringent corn stalks and soil improvement effect. Four-year continuous cropping of cotton, such as applying only a small amount of organic fertilizer, can increase the bulk density of the soil and decrease the content of soil organic matter. Therefore, it is better to combine organic and inorganic fertilizers with fertilizers and fertilizers.