The results of persimmon tree suitable timely winter shear

When fertilizing, if fertilizer or organic fertilizer alone or biological bacterial fertilizer is used alone, the vegetables can not maintain a good state of growth for a long time, because each fertilizer has its own shortcomings: concentration of fertilizer nutrients, quick after application, However, large amounts of long-term application will cause problems such as soil compaction and salinization. The organic nutrients can promote the formation of soil aggregate structure and fertilize the soil, but with low nutrient content and slow release, it can not supply enough nutrients at the late stage of vegetable growth. Biological bacterial fertilizer can activate the fixed nutrient elements in the soil and stimulate the growth and absorption of the root system. However, it does not contain any nutrient elements, nor can it supply nutrients for vegetable growth for a long time.

Understand the shortcomings of each fertilizer, you can come to the conclusion that chemical fertilizers, organic fertilizers, biological bacteria combined with the application effect is better than the individual application. However, in order to achieve a better fertilization effect, the following aspects should be taken into account in conjunction with application:

First, pay attention to the application time. Organic fertilizers are slow to apply and should be applied early. Generally, one-time base application before vegetable sowing or before planting is best. Before application, it is best to fully decompose, and the effect of post-dressing is not as obvious as base fertilizer. Fertilizers are quick to use. When basal fertilizer is applied, it should be applied about 7 days in advance. When top dressing is applied, it should be applied before critical period of vegetable nutrition or before peak period of nutrient absorption to meet its needs. Bio-fertilizer can only exert its anti-microbial action after it has been propagated in the soil. Therefore, it must be applied early before the planting of vegetables to make it grow and prosper. Biological bacterial fertilizer can be applied to the soil along with organic fertilizers, and can also be applied before planting or during planting.

Second, pay attention to the application method. The main role of organic fertilizer is to improve the soil, while providing nutrients, generally as a basal fertilizer applied to the soil, so the combination of deep plowing, so that the soil and organic fertilizer completely mix, in order to achieve the purpose of improving the soil. Because the nutrients in the organic fertilizer are dominated by nitrogen, when the basal fertilizer is applied, the nitrogen fertilizer combined with the organic fertilizer can be used less, 30% of the nitrogen fertilizer is used as the base fertilizer, and 70% is used as the top dressing. Potash can be used as a base fertilizer for one-time application. Phosphorus fertilizer due to poor mobility, the effect of post-dressing is not good, should also be applied to the soil basal fertilizer. The top-dressing fertilizer is best used with all-soluble quick-release fertilizer, so that the fertilizer can be quickly absorbed by vegetables after decomposition, and has less effect on the soil. Due to the small amount of biological bacterial fertilizer, it can be concentrated in the planting hole or with organic fertilizer. In the later stage, the same biological bacterial fertilizer can be applied multiple times to strengthen the bacterial flora, enhance its ability to release phosphorus and potassium, and improve the disease prevention effect.

Finally, pay attention to the application amount. Different vegetables have different fertility during different growth periods. The absorption of nutrients by vegetables is a certain percentage. For example, the ratio of nitrogen, phosphorus, and potassium required for tomato is 1:0.23:1.52, eggplant is 1:0.23:1.7, pepper is 1:0.25:1.31, and cucumber is 1: 0.3:1.5. Therefore, fertilization should be based on the proportion of vegetables that need fertilizer. However, because the soil already contains some nutrient elements, it is best to conduct a soil test once, according to the soil testing formula fertilization recommendations.

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