The plant nematode species are numerous and widely distributed. In particular, nematode diseases caused directly or indirectly have become major problems in the production of agricultural crops, animal husbandry, and forestry economic crops. People have also begun to attach importance to the harm of nematodes to fruit trees, trees, flowers, crops and vegetables. At present, the control of plant nematodes is still dominated by chemical control. Chemical agents not only pollute the environment, but the overall control effect is also poor. Therefore, people began to explore biological and physical methods to control plant nematodes. Some studies at home and abroad show that agricultural management measures such as fertilization affect the population of plant nematode in soil.
According to relevant experiments, traditional fertilizers, chemical fertilizers, crop stalks, organic fertilizers, and other fertilizers have great effects on the population size of plant nematodes. This phenomenon can be used to control nematode damage through fertilization measures, thereby reducing the use of chemical nematicides. . Studies have shown that: throughout the growing season, chemical fertilizers increase the population of plant nematode; fertilizer + straw exacerbates the growth of plant nematodes, and fertilizer + straw + organic manure (pig manure) reduce the number of plant nematodes. Therefore, chemical fertilizers and straw increase the amount of plant nematodes and should not be applied; organic fertilizers reduce the growth of plant nematodes and promote multiple applications. The following are some aspects that are worth noting from the relevant experiments:
First, pay attention to the harm of plant nematodes on field crops and vegetables
In the past, people recognized that nematodes were confined to fruit trees and trees, but the superiority identified from related field crop experiments is that plant nematodes are all important pathogens that cause serious damage to crops such as corn, wheat, rice, and cotton. In particular, short-line nematodes are The so-called global root rot caused by nematodes can invade plants such as the word flower family and leguminous plants and cause root rot of various vegetables, flowers, and fruit trees, and should be taken seriously.
Second, the soil applied chemical fertilizer plant nematode appears relatively high frequency
Fertilizers have the effect of promoting the growth of plant nematode populations. Although urea can increase the total soluble nitrogen in the soil, which is conducive to the growth and development of crops and increase the yield of crops, it also increases the number of plant nematodes, thus reducing crop yields. This contradiction is worth considering. Therefore, in the past, people were accustomed to applying chemical fertilizers alone. The measures needed to be reconsidered and weighed.
Third, unrefined straw will increase the number of plant nematodes
Returning crop straw directly to the field will exacerbate the increase in plant nematode populations. From June to July, it is in summer that the soil has high temperature and humidity, which is conducive to the gradual transformation of straw into organic matter. Organic matter has the effect of inhibiting the growth of plant nematodes. Therefore, the straw must be decomposed and returned to the field.
Fourth, organic fertilizer can significantly inhibit the population of plant nematode
The study found that organic manure increased soil organic matter levels, thereby significantly inhibiting the population of plant nematode populations (the mechanism of inhibition is not yet clear, but the reason may be that organic fertilizer components are more comprehensive than inorganic fertilizers, on the one hand is conducive to the survival of various organisms, and then maintained Ecological balance, inhibition of the proliferation of certain organisms such as nematodes; on the other hand, is conducive to the healthy growth of plants and the strengthening of resistance. The experiment found that before mid-June, when wheat was grown to harvest, organic manure significantly inhibited the population of plant nematode. From the middle of June to the middle of July, due to the period from corn seedling to trumpet, compared with wheat, the amount of organic fertilizer consumed by corn in the vegetative growth stage is greater, and the inhibitory force of organic fertilizer on plant nematodes gradually decreases, and the number of nematodes gradually increases. The organic fertilizers applied in the soil are depleted by corn and thus lose the effect of inhibiting the growth of the plant nematode population. Therefore, it is necessary to add organic fertilizer once after harvesting and to mid-July, and increase the amount of fertilizer.
V. Changing Traditional Concepts Fertilizing measures should be considered in many ways
The first role of fertilization is to increase the crop production, but we should change the traditional concept, scientific fertilization, comprehensive consideration of the effect of fertilization, tap its potential as far as possible, and play its best effect. Only different options may have almost the same cost, but the effects are very different. Therefore, in addition to considering increasing production, the selection of fertilization measures should include considerations such as the suppression of pests, soil conditioning, and the quality of agricultural products.
According to relevant experiments, traditional fertilizers, chemical fertilizers, crop stalks, organic fertilizers, and other fertilizers have great effects on the population size of plant nematodes. This phenomenon can be used to control nematode damage through fertilization measures, thereby reducing the use of chemical nematicides. . Studies have shown that: throughout the growing season, chemical fertilizers increase the population of plant nematode; fertilizer + straw exacerbates the growth of plant nematodes, and fertilizer + straw + organic manure (pig manure) reduce the number of plant nematodes. Therefore, chemical fertilizers and straw increase the amount of plant nematodes and should not be applied; organic fertilizers reduce the growth of plant nematodes and promote multiple applications. The following are some aspects that are worth noting from the relevant experiments:
First, pay attention to the harm of plant nematodes on field crops and vegetables
In the past, people recognized that nematodes were confined to fruit trees and trees, but the superiority identified from related field crop experiments is that plant nematodes are all important pathogens that cause serious damage to crops such as corn, wheat, rice, and cotton. In particular, short-line nematodes are The so-called global root rot caused by nematodes can invade plants such as the word flower family and leguminous plants and cause root rot of various vegetables, flowers, and fruit trees, and should be taken seriously.
Second, the soil applied chemical fertilizer plant nematode appears relatively high frequency
Fertilizers have the effect of promoting the growth of plant nematode populations. Although urea can increase the total soluble nitrogen in the soil, which is conducive to the growth and development of crops and increase the yield of crops, it also increases the number of plant nematodes, thus reducing crop yields. This contradiction is worth considering. Therefore, in the past, people were accustomed to applying chemical fertilizers alone. The measures needed to be reconsidered and weighed.
Third, unrefined straw will increase the number of plant nematodes
Returning crop straw directly to the field will exacerbate the increase in plant nematode populations. From June to July, it is in summer that the soil has high temperature and humidity, which is conducive to the gradual transformation of straw into organic matter. Organic matter has the effect of inhibiting the growth of plant nematodes. Therefore, the straw must be decomposed and returned to the field.
Fourth, organic fertilizer can significantly inhibit the population of plant nematode
The study found that organic manure increased soil organic matter levels, thereby significantly inhibiting the population of plant nematode populations (the mechanism of inhibition is not yet clear, but the reason may be that organic fertilizer components are more comprehensive than inorganic fertilizers, on the one hand is conducive to the survival of various organisms, and then maintained Ecological balance, inhibition of the proliferation of certain organisms such as nematodes; on the other hand, is conducive to the healthy growth of plants and the strengthening of resistance. The experiment found that before mid-June, when wheat was grown to harvest, organic manure significantly inhibited the population of plant nematode. From the middle of June to the middle of July, due to the period from corn seedling to trumpet, compared with wheat, the amount of organic fertilizer consumed by corn in the vegetative growth stage is greater, and the inhibitory force of organic fertilizer on plant nematodes gradually decreases, and the number of nematodes gradually increases. The organic fertilizers applied in the soil are depleted by corn and thus lose the effect of inhibiting the growth of the plant nematode population. Therefore, it is necessary to add organic fertilizer once after harvesting and to mid-July, and increase the amount of fertilizer.
V. Changing Traditional Concepts Fertilizing measures should be considered in many ways
The first role of fertilization is to increase the crop production, but we should change the traditional concept, scientific fertilization, comprehensive consideration of the effect of fertilization, tap its potential as far as possible, and play its best effect. Only different options may have almost the same cost, but the effects are very different. Therefore, in addition to considering increasing production, the selection of fertilization measures should include considerations such as the suppression of pests, soil conditioning, and the quality of agricultural products.