Pre-flower management of apple trees should pay attention to the following items:
The key to pest control
Early spring is a critical period for the prevention and control of apple pests and diseases. The first step is to scrape bark rot lesions, ring vein lesions and old cracks, clean up the orchards, control the development of the disease, reduce the density of the wormholes, and then apply wound protection agents. Spray 3 to 5 bymide lime sulfur compounds before and after pruning; in a serious orchard orchard, spray 40% bismuth arsenic wettable powder 100-200 times; apple orchard serious orchard, Penicillin sodium spray 50-100 times; in the lobular disease orchard, spray 5% zinc sulfate solution.
Fertilizer should meet nutrient needs
The application of chemical fertilizers on the basis of applying organic fertilizers to meet the needs of nutrients for flowering, fruit setting and shoot growth of fruit trees. The amount of topdressing depends on the soil, tree vigor, age, and yield. The young saplings on fertile soil do not have top-dressing, and the weak saplings on thin soils may be top-dressed. The general initial result tree is 0.5-1 kg of ammonium sulfate or 25-30 kg of human fecal urine. Fruit trees, each 1.5 to 2 kg of ammonium sulfate or 50 to 100 kg of human excrement. Timely cutting before flowering
Pre-flower cutting is an effective measure to correct mistakes in winter shearing and to make up for the destruction of the original winter-cut tree shape due to weather and mechanical damage. This measure can adjust the proportion of flower buds and leaf buds and coordinate the relationship between growth and results. For the juvenile trees that have just resulted, the flower buds should be kept as much as possible to alleviate the vegetative growth; for the young trees of the fruit period, flower buds should also be retained to obtain a certain amount of yield; for the full-fruit trees, the new year trees should be The proportion of flower buds and leaf buds is 1:3 to 1:2, and strict control of flower bud retention.
Corn, also known as wheat, maize, grain, it is one of the world's three major food crops, planting area and yield after rice and wheat, ranked third.More because of good mouth, high heat, large yield, and is widely used in a variety of livestock feed, thus known as the "King of Feed", in addition, corn is also the three food crops most suitable for industrial raw material crops, its processing of industrial products as high as more than 3000 kinds.
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