The determination of the amount of fertilizer is a complex problem involving many factors such as soil fertility status, vegetable type, and yield level.
It is necessary to determine the amount of fertilizer applied by soil testing and formula fertilization, but this is only suitable for normal cultivation and reasonable fertilization under normal climate. Considering the different growing seasons of vegetables, the soil fertilization intensity is different, and the amount of fertilizer should be different. different. Generally, early spring leeks are in the growing season from low temperature to high temperature. The growth in the early stage is slow, and it needs to be properly fertilized and promoted. The autumn sorghum vegetables are in the growing season from high temperature to low temperature, and the growth in the early stage is fast. Sometimes, from the perspective of the total amount of fertilizer, the amount of nutrients required for the whole growth period of vegetables can be reached, but the amount of nutrients required for a certain growth stage cannot be reached. If a certain amount of fertilizer is not added, the growth rate of vegetables will be increased. Slow down. To give an example, if the Chinese cabbage is not rich in fertilizer at a certain stage, it will be badly wrapped and affect its commodity value. Therefore, the amount of fertilizer should be adjusted according to the results of soil testing and the specific conditions in the greenhouse. Generally, increasing or decreasing the amount of fertilizer applied by 10% to 20% is reasonable.
It is necessary to determine the amount of fertilizer applied by soil testing and formula fertilization, but this is only suitable for normal cultivation and reasonable fertilization under normal climate. Considering the different growing seasons of vegetables, the soil fertilization intensity is different, and the amount of fertilizer should be different. different. Generally, early spring leeks are in the growing season from low temperature to high temperature. The growth in the early stage is slow, and it needs to be properly fertilized and promoted. The autumn sorghum vegetables are in the growing season from high temperature to low temperature, and the growth in the early stage is fast. Sometimes, from the perspective of the total amount of fertilizer, the amount of nutrients required for the whole growth period of vegetables can be reached, but the amount of nutrients required for a certain growth stage cannot be reached. If a certain amount of fertilizer is not added, the growth rate of vegetables will be increased. Slow down. To give an example, if the Chinese cabbage is not rich in fertilizer at a certain stage, it will be badly wrapped and affect its commodity value. Therefore, the amount of fertilizer should be adjusted according to the results of soil testing and the specific conditions in the greenhouse. Generally, increasing or decreasing the amount of fertilizer applied by 10% to 20% is reasonable.
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