How to fertilize big yam tubers?
Answer: Yam has a long growing period and needs a lot of fertilizer.
In addition to proper amount of compound fertilizer as basic fertilizer, a large amount of organic fertilizer such as fully-comminuted chicken manure should be applied. In the germination period of yam, the growth of plants is small, and the absorption of nitrogen, phosphorus, and potassium is not large. The nutrients in the base fertilizer are sufficient to meet the growth and development of the early stage of yam, and only part of the chitin, rooting agent, etc. that promote the development of the root system need to be applied. can. After entering the period of hair growth, the growth rate of plants is accelerated, and the absorption of nutrients is also increased. In particular, the demand for nitrogen fertilizers increases, and urea can be topdressed when the vines are in the upper half of the crop, which is 10 to 15 kilograms per mu. The seedlings are sparsely applied and the weak seedlings are applied in order to balance the whole field.
When the vines climb the rack and enter the tuber enlargement period, the plant's demand for potash is greater. In this period, attention should be paid to the coordinated application of nitrogen, phosphorus, and potassium, with special emphasis on the application of high-potassium fertilizers. In the later stage of growth, the amount of nitrogen fertilizer should be controlled to prevent vines from being long and consume nutrients. Yam is a chlorine-free crop and must not be treated with chlorine-containing fertilizer. In the later stage of yam growth, it can spray 0.3% potassium dihydrogen phosphate solution or chitin 2 or 3 times to protect against premature aging.
The growth of yam bean needs to consume a lot of nutrition. Under the condition that the nutrition produced by the plant is relatively fixed, yam bean will produce more, which will inevitably affect the enlargement of yam tuber, which will affect the later yield. However, yam bean is also a regulator of nutrients and moisture. When encountering adverse conditions such as insufficient supply of water and fertilizers and even cloudy days, nutrients and moisture in yam bean will turn to supply plant growth. Therefore, not all yam beans are removed.
After the yam stalks climb to the top of the rack, it is necessary to spray the plant growth regulators in a timely manner to suppress over-promoting vegetative growth, which can also play a role in reducing yam beans. For example, 15% paclobutrazol wettable powder can be sprayed 1500 times when the yam stem climbs to the top of the rack. If the plant grows vigorously, it can be sprayed every 7 to 10 days, and sprayed for 2 to 3 times.
In order to curb the production of yam bean, it can be sprayed with detoxin and ground fat at the beginning of flowering and budding of yam, spraying once every 10 days, and even spraying 3 to 4 times. If you have time, you can manually remove the yam beans, reduce nutrient consumption, make more nutrients transfer to the roots, and promote root swelling.
Insect net greenhouse also known as plant and vegetables greenhouse net. Used for prevent the insect fly into the greenhouse during the plant growing, and cover the plants. Key off the approaches that the pests (adult insect) breeding. Effective control of the spread of all kinds of harmful pests spread, such as Cabbage caterpillar, diamondback moth, aphids, flea beetles, Sweet agnates, American leaf miner, literal etc and prevent the harmful of virus spread. Significantly reduced the use of chemical pesticides, so that the planting vegetables good-quality and health.
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