The reasons for the emergence rate of cotton should be multi-faceted, including the impact of weather on the maturity of cotton in the harvest season of cotton last year, and the question of whether the cotton seedling technology is properly supported. From the climate conditions of the previous year, the weather during cotton harvesting was generally better, and it was beneficial to the maturity of cotton seeds.
For the cotton breeding technology supporting measures, most of China's cotton area now uses nutritious lotus seedlings. Generally, cotton seedlings are evaluated to have good seedling emergence or poor seedling emergence. First, the seedling rate should be seen, and secondly, the seedling rate should be considered. The reasons for low seedling emergence rate are as follows: First, among some cotton varieties, the proportion of autumn peach or late autumn peach is too large, which reduces the germination rate. Second, during the processing of cotton seeds, the seeds were not strictly controlled and the damaged seeds exceeded the standards. Third, before cotton was sown or after sowing, the pesticides used for earthworms and canopies were not sterilized, or the selected disinfecting drugs were not suitable; The weather continued to dry after sowing, and many seedlings were poorly watered when they were sown. Fifth, the soil covered with cotton was too deep or too shallow after sowing, and the seedlings with too-deep cover soil had weak seedlings. Lack of foot; Sixth, after the emergence of cotton, the leaves were not sprayed in time, and the seedlings of cotton seedlings were dead. As for the reasons for the low percentage of seedlings, some farmers report that the cotton seedlings are doing well, but it is a serious death. According to our inspections in the field, one was infected with blight, anthrax, and devastating dead seedlings. The proportion of such dead seedlings accounted for more than 80% of the entire dead seedlings; the second was damage to the cotton seedlings due to fertilizer damage or misuse of pesticides; High temperature burning seedlings. No frozen seedlings were found in the investigation.
Generally speaking, compared with inferior varieties, the emergence rate and seedling rate of fine cotton varieties are correspondingly higher. However, excellent cotton varieties cannot be equalized with high emergence rate and high seedling rate. In the process of raising cotton seedlings this year, the issue of the emergence of seedlings and the low rate of seedling emergence of the fine cotton varieties exposed has shown that some of our farmers’ friends have planted seedlings once, and the technique of seedlings once is not too hard. To this end, we must sum up experiences and lessons in the following year's cotton nursery work, grasp the following key points: First, to select high-quality cotton seed, to avoid the use of poor maturity of cotton seed; Second, before sowing seed 2 ~ 3 days, while removing the broken child, tender son; Third, the annual replacement of the seedbed to prevent soil residual pathogens; Fourth, to spray disinfection of bauxite and lidding soil; Fifth, after the emergence of cotton, the two cotyledons flat and timely spray The pesticides such as Scherbold's liquid, PuK, and Shiyueshi protect the cotton seedlings; Sixth, it is necessary to prevent drought damage, waterlogging, phytotoxicity, fertilizer damage, freezing injury and high-temperature burning of seedlings in the cotton seedling breeding process.
For the cotton breeding technology supporting measures, most of China's cotton area now uses nutritious lotus seedlings. Generally, cotton seedlings are evaluated to have good seedling emergence or poor seedling emergence. First, the seedling rate should be seen, and secondly, the seedling rate should be considered. The reasons for low seedling emergence rate are as follows: First, among some cotton varieties, the proportion of autumn peach or late autumn peach is too large, which reduces the germination rate. Second, during the processing of cotton seeds, the seeds were not strictly controlled and the damaged seeds exceeded the standards. Third, before cotton was sown or after sowing, the pesticides used for earthworms and canopies were not sterilized, or the selected disinfecting drugs were not suitable; The weather continued to dry after sowing, and many seedlings were poorly watered when they were sown. Fifth, the soil covered with cotton was too deep or too shallow after sowing, and the seedlings with too-deep cover soil had weak seedlings. Lack of foot; Sixth, after the emergence of cotton, the leaves were not sprayed in time, and the seedlings of cotton seedlings were dead. As for the reasons for the low percentage of seedlings, some farmers report that the cotton seedlings are doing well, but it is a serious death. According to our inspections in the field, one was infected with blight, anthrax, and devastating dead seedlings. The proportion of such dead seedlings accounted for more than 80% of the entire dead seedlings; the second was damage to the cotton seedlings due to fertilizer damage or misuse of pesticides; High temperature burning seedlings. No frozen seedlings were found in the investigation.
Generally speaking, compared with inferior varieties, the emergence rate and seedling rate of fine cotton varieties are correspondingly higher. However, excellent cotton varieties cannot be equalized with high emergence rate and high seedling rate. In the process of raising cotton seedlings this year, the issue of the emergence of seedlings and the low rate of seedling emergence of the fine cotton varieties exposed has shown that some of our farmers’ friends have planted seedlings once, and the technique of seedlings once is not too hard. To this end, we must sum up experiences and lessons in the following year's cotton nursery work, grasp the following key points: First, to select high-quality cotton seed, to avoid the use of poor maturity of cotton seed; Second, before sowing seed 2 ~ 3 days, while removing the broken child, tender son; Third, the annual replacement of the seedbed to prevent soil residual pathogens; Fourth, to spray disinfection of bauxite and lidding soil; Fifth, after the emergence of cotton, the two cotyledons flat and timely spray The pesticides such as Scherbold's liquid, PuK, and Shiyueshi protect the cotton seedlings; Sixth, it is necessary to prevent drought damage, waterlogging, phytotoxicity, fertilizer damage, freezing injury and high-temperature burning of seedlings in the cotton seedling breeding process.
Digital 60m short range laser rangefinder is a laser measurement device which is supposed to replace tape measure, ruler, and other traditional length meauring tool. Laser ruler as its name, it is a electronic ruler which user laser to measure distance.
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3. Volume Measure
4. Pythagorean Measure
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