There are many harm in applying unripe organic fertilizer to fruit trees.
Autumn is the best time for fruit trees to apply base fertilizer, but some fruit growers apply immature organic fertilizer when applying base fertilizer, which causes a lot of hidden dangers. 1. Burn the roots. Farm manure is mostly derived from animal manure. When these organic fertilizers are not mature, their nutrient status is slow and can not be directly absorbed and utilized by the roots of fruit trees. if they are applied, they are easy to generate heat in the process of underground ripening, resulting in root burns (commonly known as "root burning"). Cause root rot. two。 The nutrient release is out of step with the fertilizer requirement of the tree. The application of unrotten organic fertilizer in autumn takes a long time to mature underground because of the low soil temperature. The following spring, the tree needs a lot of nutrients, and the nutrients released by slow-ripening organic fertilizer can not meet the needs of the tree at all. At the same time, in the process of ripening, microorganisms will also consume some of the original nutrient elements (such as nitrogen fertilizer) in the root soil of fruit trees. In this way, trees tend to be malnourished in spring. After entering summer and autumn, the rainfall increased, the ground temperature increased rapidly, the ripening rate of organic fertilizer accelerated obviously, and the amount of organic nutrients released increased. This will lead to accelerated tree growth, a large number of strips, poor fruit coloring, excessive vegetative growth and poor flower bud differentiation ability. Some people have investigated the soil excavation in the orchard where raw manure was applied and found that some of the raw manure was still in its original state 3 years later. 3. Attract pests that survive the winter underground. Because of the large amount of animal organic matter, unripe organic fertilizer has become an ideal place for many fruit tree pests to overwinter. it is especially easy to attract beetles (grubs), peach heart borer, inchworm, boat caterpillar, pear net bug and so on, which is extremely disadvantageous to pest control.
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Introduction of herbicides commonly used in Aquatic vegetable Field
Reasonable control of the application time is generally sprayed after corn sowing, and the effect of herbicide spraying is the best when the ground is wet. Strictly control the amount of drug used in accordance with the instructions, reasonable dose, too much is easy to produce drug damage, too little can not achieve the desired effect. It is best to choose weather and wind when you avoid spraying in windy days.
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Efficient and rational application of organic fertilizer
Traditional agriculture advocates that vegetables should apply a large amount of organic fertilizer, and some farmers even think that the more organic fertilizer, the better. However, the results of many experiments in various places in recent years show that the appropriate application of organic fertilizer can effectively control the nitrate content of vegetables, and the blind application of organic fertilizer will cause the nitrate content of vegetables to exceed the standard. Vegetable nitrate.
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