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免耕结合有机物料覆盖,有利于土壤表层0-15cm尤其是0-5cm有机质、氮及磷的富集。对此,有机无机肥配合优于单施化肥,而有机物料中秸秆优于绿肥。免耕0-15cm土壤速效钾明显低于常耕。免耕0-5cm土壤出现酸化可能与有机质累积有关。土壤酸化引起0-5cm盐基流失。但土壤活性铝只有 0.22％Al_2O_3,表明土壤酸化并非十分严重。免耕对土壤C/N以及阳离子代换量等影响不明显。兔耕5-15cm土壤板结且有机质含量较低,在一定时期进行耕翻可能有助于免耕土壤潜在肥力的充分发挥。
No-tillage combined with organic material coverage, is conducive to the soil surface 0-15cm, especially 0-5cm organic matter, nitrogen and phosphorus enrichment. In this regard, organic and inorganic fertilizer with better than single chemical fertilizers, and organic materials in straw better than green manure. The no-tillage 0-15cm soil available K was significantly lower than the tillage. No-tillage 0-5cm soil acidification may be related to the accumulation of organic matter. Soil acidification caused 0-5cm base loss. However, only 0.22% Al 2 O 3 soil active aluminum, indicating that soil acidification is not very serious. No-tillage on the soil C / N and the amount of cation substitution is not obvious. Tillage plowing 5-15cm soil compaction and organic matter content is low, in a certain period of tillage may contribute to the potential fertility of no-till soil to give full play.