Many years of production practice show that the high yield of pear tree can not be separated from scientific fertilization. According to the scientific research department of fruit trees, the ratio of pear, tree and nitrogen required for nitrogen, phosphorus, and potassium is 1:0.5:1. The absorption of nitrogen has two peak periods in a year. The first peak period is in May, and the pear tree enters the peak of the growth of the leaves and branches. In the second time, in July, the pear tree enters the period of fruit enlargement. The absorption and utilization of potassium is almost the same as that of nitrogen, and there is no obvious peak period of phosphorus. Therefore, it is necessary to adopt a variety of flexible methods according to the local conditions to rob the pear tree. Here are some methods of fertilization:
According to the age of the tree, different fertilization methods are used. For young pear trees, the roots are not well developed. In order to avoid the young roots, the ring fertilization method is generally adopted at the root according to the size of the tree shrews. For adult pears, a good-natured orchard can be applied deep into the hole or with a hole. Where there is experience and conditions, multi-channel radial fertilization can be used according to the growth direction of the horizontal roots of pear trees.
Differences in different tree ages and growing trends determine the amount of fertilization. Different tree ages, growth potentials, and soil and fertility are different. It is necessary to enter large-scale pear trees with strong tree vigor and high yields. The pears with poor soil quality and low fertility also need more fertilizer. Young pear trees and soil fertility should be applied relatively little. However, regardless of the species of pear tree, pre-emergence fertilization should be applied about 10 days before germination. This is the critical period of nitrogen, which should be mainly organic fertilizer or bio-organic compound fertilizer. Each adult plant should be 30-40 kg of anaerobic slag fertilizer, 1 kg of phosphate fertilizer, 2 kg of compound fertilizer, or 3-4 kg of organic compound fertilizer, supplemented with pre-embryonic fertilizer, before flower bud differentiation (about the end of May) The second top-dressing was mainly based on high-content multiple compound fertilizers, with 2-3 kg per tree. From July to August, it is the period of fruit enlargement. Applying a strong fruit fertilizer can increase the yield and increase the sweetness of pears. At this time, potassium sulfate compound fertilizer should be used as the main ingredient. Top dressing dosage should be based on the soil texture, soil strength, tree vigor and weather. The soil with high sediment content should be fertilized in small amounts for several times to avoid the loss of nutrients after a heavy rainfall.
Responsive to the disaster, grab the fertilizer For the orchard lacking in lyrical condition, organic active liquid fertilizer can be used to apply pear tree trunk fertilization. For example, Huimanfeng or Zhuangfuxing active liquid fertilizer per acre can be used to dilute water by 250 times in the base of the trunk at 50-100 centimeters. Brushing can quickly penetrate the bark and is absorbed by the pear tree. You can also use Huimanfeng or Zhuangfuxing 200-300 times liquid to spray on the branches of the trunk before sprouting, which can exert the effect of supplementing fertilizer, and can also relieve drought. In addition, in the event of a rainy spring rain, it is necessary to grab fertiliser on the orchard ground after the rain, and then grab the plough and plough it deeply, which can also have the effect of supplementing fertilizer.
Color waxy corn is generally white, yellow, red, purple and black, white, yellow and purple corn is the basic color. The purple gene in a purple/white hybrid will naturally become purple if it "beats" the white gene, and vice versa, if it's a tie, what we see is a white/purple corn. Purple can turn into red corn and black corn, which is often called "red is purple, black is purple."
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