Dissemination Of Cotton Planting Technology: Planting Cotton Density First

Through multi year and multi site surveys, it was found that: Northern cotton region The density of the most easy to achieve high and stable yield of cotton is 2500~3000 per mu. According to the highest quality bolls per plant (at least 24 grains per boll), the quality bell of Mu is 50 thousand to 55 thousand 18~22. It can ensure that the yield of cotton per mu is stable at 275~300 kg.

According to the theoretical calculation, a large row spacing of 90 cm, a small row spacing of 50 cm (average row spacing of 70 cm), and a spacing of 33.3 cm, the density should be 2860 plants. Therefore, the general medium strength can be designed in this way.

If the soil strength is too strong or too weak, it can break through this density range. The number of bolls per plant per plant is more than that of seedlings. If the plants are weak, the number of bolls should be increased. So the density of each cotton field should be different. When sowing, every field is adjusted, and the row spacing is properly widened, and the row spacing is reduced appropriately, so as to achieve the best adaptation between density and soil fertility.

Currently in Cotton production There are two non mainstream tendencies on density.

A tendency to sparse planting. Emphasis should be placed on good varieties and strong soil strength, and the density should be between 2000~2200 strains. This density is difficult to produce in low temperature or dry years. If there are only 2000 strains, it is very difficult to achieve the minimum requirement of 50 thousand bolls per mu by requiring more than 25 Quality bolls per plant. Some people fear that increasing density will lead to the growth of cotton plants, which can be controlled by DPC.

Another tendency is dense planting. It is emphasized that cotton is not strong enough to shorten the row spacing to 60 centimeters, and the plant spacing is reduced to about 20 centimeters, with more than 5000 plants per mu. There are many cotton fields in Hebei, Qiuxian and Weixian County. Under such circumstances, the aboveground and underground environments of cotton plants are all crowded, so it is difficult to exert their individual productive potential and ultimately difficult to produce high yield.

Above appropriate density Relatively speaking, it can only be said that the production conditions and management level of most cotton fields in the North cotton region are more suitable for achieving high and stable yield. Other management techniques also have an impact on output. With the proficiency in chemical control technology, there is still room to increase the appropriate density. In 2010, the king's reunion field was the first place in the country, the average row spacing was 71.5 centimeters, the plant spacing was 30.1 centimeters, the plant spacing was 3097 centimeters, the average weight of each plant was 3097, the average quality of the bolls was 18, the quality bell of Mu was 55746, the average yield of 380 Mu was 310.1 kg.
(moisture content is only 9%).