Hybrid cotton planting improvement 3 points
In recent years, the planting area of ​​hybrid cotton varieties has rapidly expanded, and in particular, the area of ​​hybrid insect-resistant cotton varieties has dominated the area of ​​hybrid cotton. Compared with conventional cotton, hybrid cotton has obvious advantages in increasing yield, generally increasing production by more than 10% and increasing it by 15% to 20%. Hybrid anti-insect cotton has advantages against lepidoptera pests such as bollworm and pink bollworm. It is even more popular among farmers. Therefore, hybrid cotton and hybrid insect-resistant cotton accounts for about 80% of the cotton field area in many major cotton producing areas and gradually replaces conventional cotton.
However, judging from the large-scale cultivation of hybrid cotton and hybrid insect-resistant cotton varieties in the past two years, most of the farmers have achieved the purpose of increasing production and income, but some of them are unsatisfactory, and some produce even, and some even cut production. One of the reasons is that the planting method is irrational. Some wide lines are too wide, some are too narrow; some are too large and some are too small; some cotton fields have a density of 1700 to 1800 per mu, and some are less than 1100. Due to the individual development of hybrid cotton, the density of cotton fields in the field is too large, and the air and light are poor. In the lower part of the cotton plant, the budding bells fall off seriously, the peaches are less, the rotten peaches are more, and Other pests and diseases are easily induced; the density is too low in the cotton fields, Although the number of cotton single plants is more, the total number of peaches per acre decreases. It can be said that too thin and too dense will limit the yield of hybrid cotton. To this end, we must start from now on and start to improve cotton planting methods.
To seize the opportunity, the first step is to reform the ditch before the cotton is now a lot of spring flowers, leisure to facilitate the change; second, the former crop is small, but also easy to change; third is less rain in winter, a good change; four is changed Afterwards, the fields are ploughed and reserved for cotton. The soil is easy to loosen in the sun. The fifth is to kill some weeds and pests.
In a definite way, the yield structure of density cotton is determined by the number of plants per mu, the number of single plants, the total number of acres of flats, and the weight of bolls and lint. Reasonable planting methods and density are important foundations for the high yield of hybrid cotton varieties. From the current situation of growing hybrid cotton varieties in large areas, hybrid cotton is suitable for wide-row controlled-strain planting. According to the soil fertility and fertilizer input levels, the planting method and density should be finalized. The width of cotton box should be 2 to 2.4 meters. (including ditch), planting two rows of cotton, that is, spacing of 1 to 1.2 meters, spacing of 0.45 to 0.5 meters, about 1300 per mu density. This method and density are conducive to the full use of space and land; it is conducive to the cotton field operation and management; is conducive to ventilation and light; is conducive to the individual development and population development of cotton plants, the total number of peaches per acre up to 55000 to 60,000, The output per acre of seed cotton can reach about 300 kilograms.
Grasping the supporting facilities and jointly promoting the high-yielding hybrid cotton varieties has grasped the reform of planting methods and reasonable density, which has created certain conditions for the high cotton yield, but it also needs to grasp comprehensive supporting measures to seize high yields: First, it is necessary to improve the cotton field water facilities accordingly. , Open up the cotton fields, gutters, gutters and drainage gutters so that energy can be discharged; Second, we must build up organic manure to improve cotton soil; Third, during the growth of cotton, scientific fertilization, chemical regulation, shaping robust Plant type; Fourth, prevention and control of pests and diseases. Only in this way can hybrid cotton and hybrid insect-resistant cotton varieties be sure to seize high-yield harvests.
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