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深耕改土新菜地的土质一般较差,耕作层仅15厘米左右,改为蔬菜土,由于种植茬数增加,养分消耗大,应逐渐加深耕作层,改善其物理性质。深耕时间可安排在夏秋蔬菜出园时,各深翻两次,使耕作层在25~40厘米。增施有机肥要改良土壤结构,必须有能够稳定结构的物质,如改良剂、城市有机垃圾、有机肥等。施用有机肥不仅能供应蔬菜对氮、磷、钾的需要,而且能促进土壤团粒结构的形成,提高保水保肥能力和增加土壤的缓冲能力,它是培肥新菜地的物质保
Deep soil cultivation of new vegetable soil quality is generally poor, tillage layer is only about 15 cm, instead of vegetable soil, due to the increased number of planting, nutrient consumption, farming layer should be gradually deepened to improve its physical properties. Deep plowing time can be arranged in the summer and autumn vegetables out of the garden, the deep plowing twice, so that the plow layer 25 to 40 cm. To improve the soil organic fertilizer structure, there must be able to stabilize the structure of the material, such as improvers, urban organic waste, organic fertilizer and so on. The application of organic manure can not only supply the demand of nitrogen, phosphorus and potassium for vegetables, but also can promote the formation of soil aggregate structure, improve the ability of keeping water and fertilizer, and increase the buffering capacity of soil.