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科学施肥是温室蔬菜生产的重要增产措施,但菜农在温室蔬菜施肥过程中常出现—些问题,以下几点是温室蔬菜施肥中值得注意的:一、限氮增磷补钾。不少菜农在蔬菜生产中大量施用尿素、碳铵等氮肥,施氮量远远超标,造成土壤中残余大量氮素。过多的氮肥也会引起蔬菜的硝酸盐含量提高,品质下降。只有氮磷钾平衡施肥,蔬菜才能生长快,个体健壮,产量高。一般来说,蔬菜作物都喜钾,钾肥能增强蔬菜的抗病性,提高蔬菜光合作用和光合产物运转的能力。钾肥用量控制在150公斤/亩-250公斤/亩,茄果类和根菜类使用量较多,叶菜类使用量要少。钾肥一般用作基肥,如果要作追肥,也要及早施用。施用钾肥时,要深施、集中施。
Scientific fertilization is an important increase in greenhouse vegetable production measures, but vegetable farmers in the greenhouse fertilization process often appear - some problems, the following points are greenhouse vegetable fertilization is worth noting: First, limited nitrogen potassium. Many vegetable farmers in the production of large quantities of urea, ammonium bicarbonate and other nitrogen fertilizers, nitrogen fertilizer is far exceeding the standard, resulting in residual nitrogen in the soil. Too much nitrogen can also cause the nitrate content in vegetables to increase and the quality to drop. Only NPK balanced fertilization, vegetables can grow fast, individual robust, high yield. In general, vegetable crops are hi potassium, potassium can enhance the disease resistance of vegetables and improve the photosynthesis of vegetables and the ability of photosynthetic products. Potash dosage control in 150 kg / mu -250 kg / mu, solanaceous and root vegetables more use, use less leafy vegetables. Potassium is generally used as a base fertilizer, if you want to make fertilizer, but also as early as possible. When applying potassium, to deep facilities, focus on facilities.