After entering the summer, the vegetative and reproductive growth of the pear tree gradually accelerated, and the tree body gradually increased due to the external conditions. During this period, pears have high requirements for fertilizer and water, and they are also vulnerable to diseases and insect pests. How to scientifically manage pear trees in summer has become a topic of concern for fruit farmers. In this regard, Feng Yuexiu, a researcher at the College of Horticulture, Northwest Agriculture and Forestry University, put forward the following suggestions: . Soil Management: High temperatures in summer, high soil moisture, and prone to weeds. Usually after a heavy rain or after irrigation, weeding and weeding. Conditional orchards can be used to cover orchards in the orchards. After wheat is harvested, the rows of fruit trees or rows of tree trays are covered with wheat straw. The red or green orchard on the ground beneath the trees should be soiled after rain and watering, and the application of chemical fertilizers should be stopped. Fertilizer and water management: In early July, each pear tree plant in full fruiting stage applied 1.5 kg of special fertilizer for fruit trees based on phosphorus and potassium. In mid-July and late-June, combined with spraying, 300 times liquid of amino acid complex liquid Jintai Dragon can be sprayed twice to supplement the need for rapid fruit growth and development. In late July, applying 1 kg of pure potassium sulfate compound fertilizer can significantly improve pear fruit quality and yield. In August, it is generally no longer fertilized. Only 20 days before the fruit is harvested, it can be sprayed once again. After the fruit was harvested, topdressing nitrogen fertilizer was applied once, and 0.5 kg of urea was applied. After each fertilization, as long as it is not rain immediately, water immediately. Disease prevention and control: fungal disease fruit expansion and maturity are mainly meteoric disease, rust, brown spot, ringworm disease, anthrax, powdery mildew, and so on. Control measures: 1. Manual removal of diseased shoots, diseased shoots, and deep burial; 2. Cutting off cypresses and other trees to eliminate the parasitic source of rust; 3. Using 30% compound carbendazim 500 times, 70% Daisen Manganese zinc 500 times, 50% thiophanate-methyl 600 times, 10% world high 2000 times, 70% chlorothalonil 800 times, alternating use, the whole plant spray, can prevent and control these fungal diseases. Bacterial diseases such as pear blight and root cancer are bacterial diseases. After scraping, the wound is sterilized with Baume 5 degree lime sulfur or copper sulfate 100 times solution, streptomycin 400 mg/kg, etc., and coated with Bordeaux fluid. Physiological diseases yellow leaf disease caused by iron deficiency, red leaf disease is a clear feature of pear tree phosphorus deficiency, lobular disease is caused by zinc deficiency, shrinkage disease is caused by boron deficiency, black heart disease and pear tree calcium deficiency, can be based on The performance of different diseases, to the pear tree to add the appropriate nutrients. The most common waxy and sweet corn market, waxy corn has higher nutrient content than ordinary corn, containing 70-75% starch (and almost all amylose), more than 10% protein, 4-5% fat and 2 % Of multivitamins have more grains, VA, VB1, and VB2 than rice with the highest content of protein, fat and VB2. Yellow corn also contains carotenoids, such as rice and wheat. The molecular weight of waxy corn starch is more than 10 times smaller than that of ordinary corn. The starch makes glutinous rice sticky and softer than ordinary hard corn. Its digestibility is more than 20% higher than that of ordinary corn, and it is suitable for people with irregular teeth. At the same time, the content of amylose (a kind of polysaccharide) is very high, which is not suitable for diabetics.
Waxy corn is also called sticky corn. The grains have rough, waxy endosperm, similar to shiny, transparent grains, such as hard and dented corn. Its chemical and physical properties are controlled by a recessive gene located on chromosome 9. 100% of the starch in the endosperm is amylose.
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