At present, it is the peak period for the replacement of spring vegetables. Compared with the summer vegetables, the winter vegetables have a short changeover time and a bad environment. Therefore, there are many problems after the change. Due to years of planting and a large amount of fertilization, the soil eutrophication in the greenhouse is more serious, and some vegetable farmers purchase fertilizers and fertilization methods are not appropriate, resulting in changes in soil physical properties, which have adverse effects on vegetable growth. Here are some suggestions for fertilizing vegetables before changing vegetables.
First, the bottom of the plow must break
Due to years of planting, using a rotary tiller and other machinery to turn the ground, a plow floor was formed under the plough layer of about 25 cm. The humus in the bottom layer of the plow is small, the volume is large, the total porosity is small and the pores of the capillary tube are poor, so the soil permeability is poor, the water permeability is poor, and the root system is difficult to lay down. Due to the existence of the plow layer, the applied fertilizer is mostly concentrated in the ploughed soil of about 20 cm, which makes the ploughed soil eutrophic. Because water is difficult to penetrate below the plow floor, and the capillary is easy to guide the groundwater to carry more minerals, it is easy to cause soil salinization.
Therefore, when changing the raft, use a machine with a depth of more than 25 cm to deep-turn, such as a plow, a trencher, a deep-turning machine, and the like. Breaking the bottom of the plow allows the base fertilizer to be more evenly distributed, and the permeability of the soil is good for the deep roots. At the same time, it also avoids a lot of fertilization to make the soil surface eutrophication. When watering, it can carry more nutrients into the deep soil. On the one hand, it can guide the roots to grow downwards, on the other hand, it improves the soil permeability.
Second, use soil conditioner carefully
The soil conditioner is mainly based on steel slag phosphate fertilizer, which is an alkaline fertilizer, which has a good improvement effect on acidified soil and can supplement elements such as calcium and magnesium. The data show that the pH of soil suitable for vegetable growth is between 6.0 and 7.5. If the pH is less than 6, it needs to be adjusted with alkaline fertilizer.
Therefore, it is necessary to choose a soil conditioner according to the actual situation of the soil. If alkaline fertilizers such as steel slag and phosphate fertilizer are continuously used in the calcareous soil showing weak alkalinity, it will inevitably lead to alkalization of the soil. If the nitrogen fertilizer is used excessively in the alkaline soil, a large amount of ammonia gas is easily generated, causing gas damage.
Third, ditch application, hole application of manure should be cautious
When the vegetables are changed, the best method of applying the base fertilizer is to use the whole shed and deepen it, and many places are still applied in the ditch. The application of fertilizers in the ditch and acupoints has the advantages of nutrient concentration and long supply time, but the fertilization method should be noted.
The first is the location where the fertilizer is applied. The fertilizer applied to the ditch and the hole should be kept at a certain distance from the root system. Do not use the fertilizer directly under the root system, although the nutrient concentration is not conducive to the root system. Secondly, the fertilizer used for ditch application and hole application should be selected. Manure must be thoroughly cooked to avoid fermenting and burning roots in the soil.
First, the bottom of the plow must break
Due to years of planting, using a rotary tiller and other machinery to turn the ground, a plow floor was formed under the plough layer of about 25 cm. The humus in the bottom layer of the plow is small, the volume is large, the total porosity is small and the pores of the capillary tube are poor, so the soil permeability is poor, the water permeability is poor, and the root system is difficult to lay down. Due to the existence of the plow layer, the applied fertilizer is mostly concentrated in the ploughed soil of about 20 cm, which makes the ploughed soil eutrophic. Because water is difficult to penetrate below the plow floor, and the capillary is easy to guide the groundwater to carry more minerals, it is easy to cause soil salinization.
Therefore, when changing the raft, use a machine with a depth of more than 25 cm to deep-turn, such as a plow, a trencher, a deep-turning machine, and the like. Breaking the bottom of the plow allows the base fertilizer to be more evenly distributed, and the permeability of the soil is good for the deep roots. At the same time, it also avoids a lot of fertilization to make the soil surface eutrophication. When watering, it can carry more nutrients into the deep soil. On the one hand, it can guide the roots to grow downwards, on the other hand, it improves the soil permeability.
Second, use soil conditioner carefully
The soil conditioner is mainly based on steel slag phosphate fertilizer, which is an alkaline fertilizer, which has a good improvement effect on acidified soil and can supplement elements such as calcium and magnesium. The data show that the pH of soil suitable for vegetable growth is between 6.0 and 7.5. If the pH is less than 6, it needs to be adjusted with alkaline fertilizer.
Therefore, it is necessary to choose a soil conditioner according to the actual situation of the soil. If alkaline fertilizers such as steel slag and phosphate fertilizer are continuously used in the calcareous soil showing weak alkalinity, it will inevitably lead to alkalization of the soil. If the nitrogen fertilizer is used excessively in the alkaline soil, a large amount of ammonia gas is easily generated, causing gas damage.
Third, ditch application, hole application of manure should be cautious
When the vegetables are changed, the best method of applying the base fertilizer is to use the whole shed and deepen it, and many places are still applied in the ditch. The application of fertilizers in the ditch and acupoints has the advantages of nutrient concentration and long supply time, but the fertilization method should be noted.
The first is the location where the fertilizer is applied. The fertilizer applied to the ditch and the hole should be kept at a certain distance from the root system. Do not use the fertilizer directly under the root system, although the nutrient concentration is not conducive to the root system. Secondly, the fertilizer used for ditch application and hole application should be selected. Manure must be thoroughly cooked to avoid fermenting and burning roots in the soil.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Luggage Wheel Axle,Replace Luggage Wheels,Replacement Wheels For Luggage,Carry On Luggage Wheel
VOLO silent wheel , https://www.volowheels.com