Cotton and cotton intercropping autumn sowing technology essentials
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Choose lands with moderate soil fertility and irrigated conditions. In the autumn, 3,000 kg of high-quality base fertilizer, 40-60 kg of phosphate fertilizer and 20-25 kg of nitrogen fertilizer should be applied per acre, and 4 water must be ensured: water at the bottom of the wheat, jointing water (ie cotton sowing before planting), and heading grouting water (ie The seedling water of cotton) and the stubble after the harvest.
According to local conditions, choose the interplanting method. Suitable for the promotion of the Huang-Huai-Hai area is mainly the following four kinds: First, "4-2". Bandwidth 1.6-1.7 meters, 4 rows of wheat in autumn, covers an area of ​​60 centimeters, leaving 1.0-1.1 meters empty, interplanting two rows of spring cotton, cotton small row 50 centimeters, cotton harvest after the act of 1.1-1.2 meters. This method has been rated as the best interplanting method in Shandong Province, and the average yield per mu can be 200-300 kg of wheat and 80-160 kg of cotton. The second is the "three-two style." Bandwidth 1.46 meters, three rows of wheat, covering 40 centimeters, sets of two rows of spring cotton, cotton small row 46 centimeters, big row 100 centimeters. In this way, cotton is easy to grow early and is suitable for medium water and fertilizer plots. The average yield per mu is 200-250 kg and cotton is 70-85 kg. The third is the "three ones." The bandwidth occupies 40 centimeters, sets a row of spring cotton, and after the wheat is harvested, the cotton becomes 1.0-11 meters. In this way, the wheat yield is high, but cotton is difficult to keep seedlings, and it is easy to be late, suitable for local applications where the water and fertilizer are sufficient, the land is good, there are many people, and the management technology is high. The fourth is "Two-in-one" and applies to cotton and summer cotton. Bandwidth 60 cm, 2 rows of wheat, covering 20 cm, interplanting 1 row of summer cotton, wheat after the cotton is 60 cm and other lines.
Cotton and wheat are planted in high and low levels and suitable for wheat spring cotton. Before sowing, the wheat is planted in high and low levels. The wheat is sown in the low sorghum. In the middle of the sorghum, there are two rows of cotton. The width of the sorghum is 100 centimeters, which is 15 centimeters higher than that of the low sorghum. The height of the sorghum that is lined with one line of cotton is 50-70 centimeters wide.畦 12 cm higher. High and low glutinous planting can effectively reduce the shading of wheat to cotton and facilitate watering of wheat, which is beneficial to the improvement of ground temperature of cotton.
Use suitable cotton varieties. In the Huanghuaihai region of China, the following varieties can be selected according to local conditions: Wheat should be selected from late-maturing early-maturing, short culm, disease-resistant, lodging-resistant, and fast-growing or semi-winter high-quality high-yielding varieties such as Jinan No. 19, Yannong No. 19, Yannong No. 15, Laizhou No. 3279, Lumai No. 21, Lumai No. 20, and Wumai No. 30 etc. Cotton should use early-maturing or medium-early-maturing varieties with strong resistance to diseases and pests and short growing periods, such as Zhongmian 37, Xinmian 33B, Xinmian 32B, standard A1 and Zhongmian 30.