Why is the amount of soil fertilization increasing?
2023-01-18 05:05:33
When investigating in the countryside, I often heard farmers say that soil fertilization is now more and more. In the past, one or twenty kilograms of chemical fertilizer was applied, and the yield per mu was three or four hundred kilograms. Now, the application of thirty or forty kilograms has no effect. It is really the appetite of the soil. "Is it increased?" Indeed, in many places the appetite of farmland soil has increased, for four reasons:
With the single saying of fat, the mouth of the mouth should be eaten, and the roots should be fat. Crops need to absorb various nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron and other nutrients and boron, manganese, molybdenum, zinc, copper and other trace elements. Each of these elements has expertise, and none of them are missing in the crop. However, the application of chemical fertilizers now mostly contains only one or two nutrients required by the crops, so that the long-term application alone results in more nutrients in the soil, less and less, and crop yield. It is also determined by the lack of nutrients. For example, phosphorus can promote the division and proliferation of cells in the body and the synthesis, transformation and transportation of organic matter, improve the drought resistance, cold resistance and disease resistance of crops, and improve the yield and quality. If the supply of phosphorus is insufficient, the stems and leaves will stop. Growth, root dysplasia, less tillering, heading, flowering, maturity delay, grain is not full, yield is not high. For example, if a large amount of nitrogen fertilizer is applied in the phosphorus-immersed cold-immersed fields and duck-bucked mud fields, even if much is applied, the yield will not go up; for example, there are not many potassium in the southern rice fields, such as a large amount of nitrogen fertilizer and phosphate fertilizer, and no potassium fertilizer. Nor can it take high yields. Therefore, fertilization cannot be “single-on-oneâ€, and it is necessary to pay attention to the application of various fertilizers.
Soil compaction applied a large amount of ammonia water and ammonium bicarbonate in paddy fields and dry soils, but neglected the application of organic fertilizers such as farmyard manure. As a result, the concentration of ammonium in the soil increased, and the calcium adsorbed on the soil colloid was replaced, and the water was lost. In one year, the soil becomes worse and worse, eventually causing stagnation, affecting soil aeration and water permeability, and affecting the activities of beneficial microorganisms in the soil. The roots of crops grow in the soil that is closed and closed, affecting the absorption of crop nutrients, and It will also grow poorly and have a variety of physiological symptoms. Even if more single fertilizer is applied to this soil, the effect of increasing production will not be seen.
Improper fertilization For a long time, nitrogen fertilizer has been applied to the surface of rice fields. The utilization rate is only 30% to 50%. The utilization rate of ammonium carbonate is lower, generally only 26%. Most of the others become ammonia gas and go to the air. If the fertilization technique can be improved and the shallow application is applied as a deep application, the utilization rate can be increased by a factor of 1 or more. Another example is the application of superphosphate phosphate fertilizer in farmland. In many places, in order to facilitate the quick map, the phosphorus in the superphosphate will be quickly fixed by the iron and aluminum in the field, so Calcium superphosphate should be applied by concentrated application such as acupoint application or ditch application, or after application with organic fertilizer, the utilization rate can be greatly improved.
Soil erosion is caused by deforestation and slope-opening in many places. The scouring effect causes the soil surface to be severely washed away. Most of the nutrients in the soil are mostly washed away by rain. Over time, the soil is getting worse and worse. The nutrients in the nutrients cannot meet the crop growth needs, and the fertilizer must be applied in large quantities to survive. This is also the problem of more and more crop fertilization, a problem that cannot be ignored.
The appetite of soil for fertilizer is getting bigger and bigger, and there are many reasons for it. Some of them are caused by human factors, but as long as we take corresponding measures, the problem is not difficult to solve. First of all, in addition to doing a good job of soil and water conservation, and vigorously adding organic fertilizers while applying chemical fertilizers, the application of nitrogen, phosphorus and potassium must be applied in fertilization technology. Carry out soil surveys, find out the distribution of nutrients in the soil, do a good job in soil testing and fertilization, and use fertilizers in a symptomatic manner, so as to fully exert the effect of increasing the production of various nutrients. In the farming technique, the rice fields are “sucked and blood-suckingâ€. Soil fertility is the ability to comprehensively express water, fertilizer, gas and heat. The soil in the south is sticky and has long waterlogging. It often lacks heat and gas, and the nutrients in the soil are “hiddenâ€. Although the organic matter content of this field is high, the quick-acting nutrient release is slow, the fertilizer is poor, and some even have “fat in the middle of the field, and the rice is hungry.†If the paddy field is dried and whitened, it can increase the gas and heat. Promote oxidation and receive the effect of “study and blood circulation†to rice fields. According to the experiment, after the dry cultivation and whitening, the soil available nutrients can be increased by 30% to 40%, and the release potential of nutrients in the soil can be exerted for the absorption and utilization of the crops, and the utilization rate of the fertilizer is obviously improved.
With the single saying of fat, the mouth of the mouth should be eaten, and the roots should be fat. Crops need to absorb various nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron and other nutrients and boron, manganese, molybdenum, zinc, copper and other trace elements. Each of these elements has expertise, and none of them are missing in the crop. However, the application of chemical fertilizers now mostly contains only one or two nutrients required by the crops, so that the long-term application alone results in more nutrients in the soil, less and less, and crop yield. It is also determined by the lack of nutrients. For example, phosphorus can promote the division and proliferation of cells in the body and the synthesis, transformation and transportation of organic matter, improve the drought resistance, cold resistance and disease resistance of crops, and improve the yield and quality. If the supply of phosphorus is insufficient, the stems and leaves will stop. Growth, root dysplasia, less tillering, heading, flowering, maturity delay, grain is not full, yield is not high. For example, if a large amount of nitrogen fertilizer is applied in the phosphorus-immersed cold-immersed fields and duck-bucked mud fields, even if much is applied, the yield will not go up; for example, there are not many potassium in the southern rice fields, such as a large amount of nitrogen fertilizer and phosphate fertilizer, and no potassium fertilizer. Nor can it take high yields. Therefore, fertilization cannot be “single-on-oneâ€, and it is necessary to pay attention to the application of various fertilizers.
Soil compaction applied a large amount of ammonia water and ammonium bicarbonate in paddy fields and dry soils, but neglected the application of organic fertilizers such as farmyard manure. As a result, the concentration of ammonium in the soil increased, and the calcium adsorbed on the soil colloid was replaced, and the water was lost. In one year, the soil becomes worse and worse, eventually causing stagnation, affecting soil aeration and water permeability, and affecting the activities of beneficial microorganisms in the soil. The roots of crops grow in the soil that is closed and closed, affecting the absorption of crop nutrients, and It will also grow poorly and have a variety of physiological symptoms. Even if more single fertilizer is applied to this soil, the effect of increasing production will not be seen.
Improper fertilization For a long time, nitrogen fertilizer has been applied to the surface of rice fields. The utilization rate is only 30% to 50%. The utilization rate of ammonium carbonate is lower, generally only 26%. Most of the others become ammonia gas and go to the air. If the fertilization technique can be improved and the shallow application is applied as a deep application, the utilization rate can be increased by a factor of 1 or more. Another example is the application of superphosphate phosphate fertilizer in farmland. In many places, in order to facilitate the quick map, the phosphorus in the superphosphate will be quickly fixed by the iron and aluminum in the field, so Calcium superphosphate should be applied by concentrated application such as acupoint application or ditch application, or after application with organic fertilizer, the utilization rate can be greatly improved.
Soil erosion is caused by deforestation and slope-opening in many places. The scouring effect causes the soil surface to be severely washed away. Most of the nutrients in the soil are mostly washed away by rain. Over time, the soil is getting worse and worse. The nutrients in the nutrients cannot meet the crop growth needs, and the fertilizer must be applied in large quantities to survive. This is also the problem of more and more crop fertilization, a problem that cannot be ignored.
The appetite of soil for fertilizer is getting bigger and bigger, and there are many reasons for it. Some of them are caused by human factors, but as long as we take corresponding measures, the problem is not difficult to solve. First of all, in addition to doing a good job of soil and water conservation, and vigorously adding organic fertilizers while applying chemical fertilizers, the application of nitrogen, phosphorus and potassium must be applied in fertilization technology. Carry out soil surveys, find out the distribution of nutrients in the soil, do a good job in soil testing and fertilization, and use fertilizers in a symptomatic manner, so as to fully exert the effect of increasing the production of various nutrients. In the farming technique, the rice fields are “sucked and blood-suckingâ€. Soil fertility is the ability to comprehensively express water, fertilizer, gas and heat. The soil in the south is sticky and has long waterlogging. It often lacks heat and gas, and the nutrients in the soil are “hiddenâ€. Although the organic matter content of this field is high, the quick-acting nutrient release is slow, the fertilizer is poor, and some even have “fat in the middle of the field, and the rice is hungry.†If the paddy field is dried and whitened, it can increase the gas and heat. Promote oxidation and receive the effect of “study and blood circulation†to rice fields. According to the experiment, after the dry cultivation and whitening, the soil available nutrients can be increased by 30% to 40%, and the release potential of nutrients in the soil can be exerted for the absorption and utilization of the crops, and the utilization rate of the fertilizer is obviously improved.
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