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蔬菜生产的特点是:生长期较短,复种茬口多,生产量大,需大量吸收利用土壤所含的各种营养元素,消耗地力则依靠大量施肥补充。因此,菜地长期以来均以大量施用有机肥,近城菜区则又以利用人粪尿为主要肥源,对保持与提高土壤肥力,从而获得蔬菜高产有重大作用。在这种高消耗,高补充的植物养分循环中,尤其是氮、磷、钾主要营养元素的消耗与供应状况,对土壤肥力及蔬菜产量有着重大影响。
Vegetable production is characterized by: short growth period, stubble stubble, large production capacity, the need to absorb a large number of nutrients contained in the soil, consumption of manpower depends on a large number of fertilization supplement. Therefore, the vegetable farms have been using large amounts of organic fertilizer for a long period of time, and the near urban vegetable area has also used human waste as the main source of fertilizers, which plays a significant role in maintaining and improving soil fertility, thereby obtaining high yields of vegetables. The consumption and supply of major nutrient elements such as nitrogen, phosphorus and potassium in this high consumption and highly supplemental plant nutrient cycle have a significant impact on soil fertility and vegetable yield.