The selection of yam varieties: At present, the main cultivars of yams include fine yam yam, yam yam and Japanese yam and yams. Selection of trenches The cultivation of yams should be avoided as much as possible, generally every three years, and avoid peanuts and red leeks. To choose a deep, loose and fertile plot of soil, it is required to be consistent with the upper and lower soils. The following layers are viscous heavy soil layer and Baishagang soil layer, which should be completely broken when ditching, and at least 1-1.2 meters of soil layer can not have clay. , soil sand and other mezzanine. Otherwise it will affect the appearance of tubers, also have an impact on quality. Neutral soil is appropriate, and trenching is generally used for mechanical trenching. When double rows are planted, the rows are 1.7-1.8 meters long, and the small row spacing (the row spacing of the two yams in the trench) is 40 centimeters. The spacing is 20-25 centimeters, the depth is 85-100 centimeters, and the width is 70 centimeters. Leveling should be done while soil preparation is being done to prevent uneven pouring when watering. In addition, drainage design is also required to ensure that there is no stagnant water in the field. The spacing is 80-100 cm in a single row, the width is 30 cm, the depth is 90-100 cm, and the spacing is 20-25 cm. Suitable sowing The greenhouse yam generally requires that the surface temperature of 5 cm is stable over 9°C-10°C. Before sowing, the yam seedlings are air-dried, which can activate the seed potatoes, and can also play a role in sterilization and high germination rate. If the yam stem is cut off and used as a seed potato, lime powder may be used in the incision to disinfect. In the next kind of time, you have to make a piece under the bud, under a big one, so that the buds will come out. 1. Shallow dressing. If the basal fertilizer is used more, then less top dressing or no top dressing, in order to ensure high yield of yams, usually topdressing 2-3 times, when the plants on the ground grow to about 1 meter, topdressing a high-nitrogen compound fertilizer, after every week or so chase Apply once, 3 times. The yam inflated period is mainly composed of multi-element compound fertilizers with high phosphorus and potassium contents (the ratio of yam to nitrogen, phosphorus, and potassium is 1.5:2:5), about 30 kilograms per mu, and it is best to adopt flushing methods. In the late growth stage, 0.2% potassium dihydrogen phosphate and 1% urea can be sprayed to prevent premature aging. In particular, it should be noted that the absorption root system of yam is shallow, occurs early, and extends in the horizontal direction. Fertilizer should be applied to the shallow soil layer for yam root absorption. 2. She must be in prison. The plug and weed yam are soaked with 6-10 cm of open soil after sowing. After pouring, 150-200 g of “Chinese yam herbicides†are used to uniformly spray 100 kg of water, and then the plastic film is shorn. About meters, the front was "person" type, the sides obliquely crossed, separated by 7-8 meters with a thick bamboo pole or wooden rod reinforcement, in short, must be firmly in place to prevent tripping. 3. Qiao water. The yams should not be too dry if they are afraid of it. If the drought is too severe, it will seriously affect the swelling of the yam, especially in the tuber enlargement period. During this period, it usually takes about 10 days to pour water, and watering should be done according to the soil moisture. 4. Disease and pest control should keep up. Diseases and insect pests are more severe in the heavy land masses, and the incidence of land masses cultivated in the first year is lighter. After the yam vine spreads on shelves, spraying control is started. The main disease of yams is anthrax, which is a fungal disease. The people are called defoliation disease. The leaves in the initial stages of performance are yellow, and there are small spots on the leaves. Finally, the stems are littered and the leaves fall. This disease is mainly prevention. The diseased seed potato was soaked with 25% carbendazim 500 times for 25-30 minutes before sowing, and the seed potato was disinfected. After cultivation, the field management was strengthened and the disease resistance of the plant was enhanced. Can be used in the early onset with 70% mancozeb 500-600 times, 50% thiophanate-methyl 500-600 times alternating spray, the incidence of weight can be used in Japan, "Yatake" yam special formula pesticides, early onset of the disease every 7 - Spray for 10 days, usually spray 2-3 times. Safety helmet is made out of high impact
resistant ABS or HDPE,it is suitable for safety protect head when
working aloft, with 4 or 6 point suspension, also can choose ratchet or
pin lock, some type of helmet with ventilation provide the maximum in
air circulation for comfort. Safety Helmet ,Hard Helmet,Plastic Safety Helmet,Industrial Safety Helmet Greateagle Safety Products Co., Ltd. , https://www.greateaglesafety.com
Conform to the standard CE EN 397:2012/ ANSI Z89.1-2009 /GB2811-2007.
Universal slots allow hearing, welding and visor accessories to attach easily.
Yam cultivation method