Sweet potato counter-season cultivation techniques

Sweet potato counter-season cultivation techniques

In order to improve the economic benefits of planting sweet potatoes, in addition to post-harvest deep processing, sweet potatoes can also be marketed through anti-season cultivation. Two kinds of back-season cultivation techniques are introduced.
1. The method for the cultivation of sweet potato from May to June is based on the method of adding greenhouses in greenhouses and small sheds within the ridge to increase the insulation effect. It can be planted from December to January. Virus-free seedling shoots are planted in a small arch shed. The output of each 667 square meters is 1300kg in May. Income is much higher than conventional planting.
Cultivation management points: In a small arch with a width of about 150cm, two ridges (70cm per ridge head) are covered with a wide film cover and the ridge head is plugged with soil and then irrigated in a furrow (water consumption is about 17t per 667m2). The long seedlings of 7-8 expanded leaves were inserted horizontally, and the temperature in the small arch shed was kept within the range of 5-35°C by ventilation. If the outside temperature rises, you can open the side of the greenhouse ventilation. In early March, small sheds in greenhouses were removed. On both sides of the greenhouses in mid-March, the top sheds were removed in early April. The temperature in mid-April was taken as the standard, and adjustments were made according to weather conditions. In a small shed, if it is above 40°C for a long time, the lack of light will make the peel thin, so if there is no night frost, it can open the greenhouse early. Varieties should be selected at low temperature conditions, good root swelling, potato chips good appearance of early maturing varieties.
In July and August, the cultivation techniques of fresh potatoes listed on the market can refer to the methods of vegetable cultivation. From late March to early April, seedlings can be planted. The potato seedlings are taken from the electric hotbed in greenhouses for 1-2 months and cultivated 5-6 short seedlings. Small sheds can cover two small ridges (ridge width 65-70cm); they can also cover only one large ridge (100-120cm ridge width). ) Cross double line insertion. After pouring, cast thin manure water, cover the mulch after survival, etc. When the temperature is high in a small sunny shed, clear the mulch to open the potato seedlings; if it is cloudy and rainy, insert the seedlings to cover the mulch and then insert the seedlings. Upright leaves do not allow the leaves to stick to the film. If it is not yet alive after insertion, in case of a continuous sunny high temperature, the grass should be covered properly on the membrane so as not to burn the mother leaf or even cause dead seedlings. When the outside temperature exceeds 20°C in April, the temperature in the small arch shed exceeds 35°C. The first two can be exposed and the middle side can be cooled and the temperature of the soil under the membrane can be adjusted to 25-30°C, which is most favorable for the expansion of the tuber. After the external temperature stabilized at 25°C or more after May, remove the small shed and keep the mulch to raise the soil temperature. After entering the Meiyu season, it is beneficial to drainage and protects the ridge from rain. If black mulch is selected, weed growth can also be reduced; when entering high temperature and drought in July, the cover film can reduce moisture evaporation and play a role in maintaining glutinous rice. According to the test results, sweet potato cover film harvested in August can increase production by 30% compared with non-covered film. -50%, so you can fully recover your investment.
Variety should use early maturing varieties, if the early harvest in July should be short-line 3000 lines / 667 square meters, in order to reduce the number of tubers, increase the rate of commodity potatoes; if the market is inserted horizontally or obliquely inserted 4000 / 667 square meters For better, can produce 150-300g of medium-sized potato block, improve the commodity potato rate.


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