Vegetables are hi calcium crops. People tend to pay attention to the application of nitrogen, phosphorus, and potassium fertilizers when planting, and contempt for calcium fertilizers. With the emergence of a large number of facility cultivation, it is more likely to cause calcium deficiency in the greenhouse. So how do you rationally add calcium to vegetables?
1. Reasonable choice of calcium fertilizer: Different calcium fertilizers have different properties. The pH value of the soil in the greenhouse is mostly 6.5 to 7.5. Alkaline substances or neutral fertilizers such as hydrated lime and calcium nitrate should be used, but less acidic. Or physiological acidic substances. Ordinary phosphate fertilizers such as superphosphate, calcium magnesium phosphate, and heavy superphosphate are important sources of calcium. Bone meal and grass ash all contain a certain amount of calcium, which is also a non-negligible source of calcium.
2, the best period of fertilization: After the vegetable growth into the prosperous period, the soil calcium nutrition began to decrease, while the calcium in the leaves of the vegetables began to decrease, then calcium fertilizer is the best period. In order to prevent calcium deficiency in the early stage of vegetable growth, basic application of calcium fertilizer can be used. In greenhouses planted for many years, generally, 2000-3000 kg of decomposed organic fertilizer is applied to Mushi, and then superphosphate is added to 30-45 kg.
3. Appropriate fertilization methods: For growing vegetables, especially after entering a vigorous growth period, calcium fertilizer can be supplemented by top-dressing methods. Usually, 40 to 60 kilograms of hydrated lime are used per acre, and the amount of lime used in sandy soil is appropriately reduced. This will not only be able to supplement calcium, but also help to neutralize soil acidity and improve the soil pellet structure. Can also be combined with disease-prevention spray using foliar fertilizer topdressing calcium, top dressing concentration is generally 0.3% ~ 0.5% is appropriate. Generally can be sprayed with 0.1% to 0.2% of calcium nitrate or 1% of superphosphate, spraying once every 15 days or so, even spray 3 to 4 times, the effect is good.
Beans are mainly soybeans, broad beans, red beans, mung beans, soybeans, black beans, cowpeas, peas, sword beans, lentils, kidney beans, chickpeas, dal and so on.
The main nutrients in beans include carbohydrates, protein and fat. Protein in beans is an important component of beans.
â‘ Protein: Soy protein in eight kinds of essential amino acids the human body needs with the United Nations food and agriculture organization (FAO) recommended are very reasonable compared to the ideal value of soy protein has good amino acid composition pattern, rich in glutamic acid, alanine and aspartate and contains high lysine, methionine and tryptophan (amino acid) sulfur content is low, However, some grains contain high content of sulfur amino acids and low content of lysine, so some grains can be appropriately combined with legumes, which can play a complementary role in protein, so as to improve the nutritional value of food .
â‘¡ Fat: soybean and black bean have higher fat content, while other beans, such as kidney bean, except soybean and black bean, have lower fat content, but their fatty acid composition pattern is better, mainly polyunsaturated fatty acid, mainly including linoleic acid, linolenic acid, etc.
â‘¢ Vitamins: beans contain vitamin A, vitamin B, vitamin C and vitamin E.
â‘£ Minerals: different beans contain different minerals, such as soybeans are rich in iron, kidney beans contain calcium, iron, potassium, magnesium.
⑤ Dietary fiber: beans contain dietary fiber, which is good for the body.
â‘¥ Pigment: soybean isoflavones are one of the flavonoids, mainly exist in leguminous plants, flavonoids is a kind of plant pigment. Soybean isoflavones are secondary metabolites formed during soybean growth. It can compensate for the lack of estrogen in women after age 30, improve skin moisture and elasticity, relieve menopausal symptoms and improve osteoporosis. The estrogen effect of soybean isoflavones affects hormone secretion, metabolic biological activity, protein synthesis and growth factor activity.
Types Of Beans,Types Of Green Beans,Bean Varieties,Types Of Red Beans
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