Key Techniques of Spring and Summer Cultivation in South China

It is very important to cultivate and manage the spring and summer alfalfa in the south of China, which has a great influence on the quality of alfalfa. Only careful management of cultivation, management of fertilization, prevention of diseases and insect pests, thinning of fruit and fruits, bagging of fruits, etc. are carried out so that the production of oysters is not only high in yield, but also in good quality and low in residual pesticides. Only by strengthening its market competitiveness can we obtain better economic benefits. First, apply strong fruit fertilizer.枇杷 Fertilization should be dominated by organic fertilizers, supplemented by chemical fertilizers. In March and May, it is an important period for the growth and growth of alfalfa. It needs a lot of water and nutrients to meet the needs of fruit growth. Therefore, a strong fruit fertilizer must be applied in the middle of March. Each tree producing more than 20 kilograms of fruit, each plant 50 kilograms of livestock manure, 0.25 kilograms of potassium sulfate or 0.20 kilograms of potassium chloride, calcium superphosphate or calcium phosphate fertilizer 1 kilogram. The eucalyptus trees with a fruit weight below 20 kg were planted with 25 kg of human feces, 0.2 kg of potassium sulfate or 0.15 kg of potassium chloride. Superphosphate or calcium phosphate 0.5 kg. To promote fruit growth, coloring and increase fruit sweetness and improve fruit quality. Second, do a good job in pest control. Spring and summer are the seasons with the most occurrence of cockroach pests and diseases. There are mainly insect pests such as cockroaches, aphids, borerworms, and hornbills. The main pests and diseases are cockroach brown rot, anthrax, and brown patch. The key period of pest control should be grasped in due course, and appropriate pesticides should be selected so that the drugs can be used alternately to treat diseases and pests in order to reduce pests and diseases and improve yield and quality. (a) In mid-March, 50 grams of omethoate, 50 grams of carbendazim, and 50 kilograms of water were sprayed and sprayed with the key spray. (2) Before April 10th, use 50 grams of fenvalerate, 50 grams of gentifoline, 100 g of potassium dihydrogen phosphate, and 50 kg of water, spray the crown and fruit. Third, fruit bags, improve quality. The rate of flowering and setting in Chongqing is higher, with as many as tens of grains per panicle, but the quality of the fruit is poor and the taste is sour. High-quality and large-sized fruit is priced at 5-6 yuan per kilogram, and the inferior small fruit is only 1 yuan per kilogram, and sales are very difficult.枇杷 Sparse fruit thinning and fruit thinning are important measures to improve fruit quality and economic efficiency. Therefore, fruit growers in the wolfberry producing areas should actively promote the sparse fruit thinning and fruit thinning. The fruit thinning method: First, the fruit scissor cutters are disinfected in boiling water before they can be used for fruit thinning. In fruit thinning, large fruit varieties contain 2 to 3 large fruits per panicle, 3 to 5 medium-sized fruits, and no more than 8 small fruits. The fruit and fruit must be eliminated when the fruit is thinned. If you do, keep strong and strong fruit. After the fruit removal process, the enemy should immediately kill 50 grams, add 100 grams of carbendazim to water 50 kilograms, and mix and spray the tree branches, leaves, and fruits to prevent diseases and insect pests. To improve the quality of loquat, in addition to other measures, it is also necessary to carry bagging, because bagging can reduce the amount of pesticides, so that the results can be achieved pollution-free green food requirements, but also make the fruit surface smooth, thereby improving the quality, increase Market competitiveness. Bagging time, the fruit of loquat in the early stage of the green to yellow. Before bagging, 50 grams of the enemy must be killed, 50 grams of carbendazim, and 50 kilograms of water should be used to spray the crown and fruit. The bag can be bagged on the second day after the liquid dries. Fourth, the management of planting trees in the fall will be high. (I) Cutting anvils and buds: In the middle and early March, an anvil and an anvil were cut at a height of 0.5 cm above the upper end of the buds of the eucalyptus planted in the autumn of last year. After the saw anvil was exposed, sprouts were sprouted. (B) to solve the film, in addition to Meng: in the anvil or saw anvil every 10 days or so except for the Meng once, in the June - July spring shoots lignified after the release of the thin film. (3) Fertilizer-promoting shoots: Each time in March and July, the shooter fertilizer is applied one at a time. According to the size of the tree, 15-25 kg of livestock manure is applied per plant. Potassium sulfate 0.25 kilograms, superphosphate 1 kilogram, fertilize in open pits, dry soil and fertilizer after dry. (4) Topping: When the shoots are grown to 15 cm in length, they must be picked in time to promote robust growth and multiple branches. (5) Pest control: In the period of high-risk accession, the control of aphids, yellow caterpillars, and anthracnose should be conducted in a timely manner during the extraction of the branch shoots of eucalyptus, and the use of pesticides and formulas should be carried out in accordance with the prevention and control of pests in front.