Selection and use of vegetable foliar fertilizer


   Scientific and rational use of foliar fertilizer is very important for vegetable growth. The following describes the use of foliar fertilizer based on different types of vegetables. The leafy vegetables need more water and fertilizer during the whole growth period, especially the quick-acting nitrogen fertilizer is more sensitive and urgent. If the nitrogen fertilizer is insufficient, the leaves are yellow-green, the growth is slow, and the yield is greatly reduced. Therefore, in addition to the application of the base fertilizer, spray 1% to 2% urea (ammonium sulfate) solution in the seedling stage, middle and late stage, 7 days to 10 days , continuous spraying 2 to 4 times can accelerate leaf extraction and rapid growth. And it can save costs and increase nitrogen use efficiency, which is 20% to 30% higher than soil application . If you add foliar fertilizer such as Green Fenway No. 2 ( 1000 times to 1500 times), 802 ( 2000 times to 3000 times), Foliar ( 1000 times), and Hui Manfeng ( 500 to 1000 times) in urea water , The effect of increasing production is more significant. Vegetables such as melons have a relatively balanced need for nitrogen, phosphorus, potassium and trace elements (mainly boron, zinc and molybdenum). In the Deng Miao period , nitrogen needs to be heavier than phosphorus and potassium. The three factors in the flowering period need to be more. The potassium and phosphorus are heavier than nitrogen in the fruiting period. If the nitrogen fertilizer is insufficient during the seedling stage, it is easy to prematurely decay and the fruit is small; if the nitrogen fertilizer is too much, it is easy to grow, fall off and late, so the fertilization of melon and fruit vegetables should be scientific. That is to say, 1% to 2% urea water is used in the seedling stage to add 3000 times 802 liquid spray to benefit the long leaves of the roots; the flowering period is 1% to 2% urea water mixed with 0.1 to 0.3 boric acid and 1000 times plant power 2003 solution spray 2 The next ~ 3 times ( about 7 days each time ), in order to increase the fruit setting rate and prevent "flowers and not real"; the result period is to choose 1% ~ 2% urea aqueous solution, or 0.2% ~ 0.3% potassium dihydrogen phosphate solution Spraying, every 7 days to 10 days, a total of two or three times, can fully supply the fertilizer needed for vegetable plants , and has a significant effect on reducing watering and fruit drop. The roots and vegetables of this kind need more phosphorus and fertilizer in the world during their whole growth period than nitrogen fertilizer, especially in the middle and late stages. The lack of potash, the leaves manufactured organic nutrients to the roots slow delivery unit and less easy to suffer from premature aging and withered leaf (or brown spot) disease. Therefore, in addition to a small amount of nitrogen fertilizer in the seedling stage, such vegetables should be applied with potassium and phosphate fertilizers in the middle and late stages. Choice of 1% to 2% of the supernatant through soaking calcium phosphate, potash 1% chemical solution, once every 7 days, a total of 2 or 3 times spray. According to the data, root-stem vegetables are sprayed with compound auxin 1 to 2 times in the middle and late stages ( 20 grams of water to 15 kg), which can increase production by 15% to 35% , 7 days to 10 days in the morning, and drought resistance. Water-saving, cold-resistant, and stress-resistant.

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