Cotton continuous cropping high yield cultivation method

Abstract

The invention relates to a cotton continuous cropping high yield cultivation method, aiming at solving the technical problem of overcoming continuous cropping obstacles to achieve high yield cotton. In the invention, sea-island cottons or land-sea hybrid cottons which are highly resistant or immune to vascular bundle disease verticillium wilt and fusarium wilt are taken as rootstocks; conventional upland cottons variety with good affinity to the rootstocks are taken as scions; grafting is carried out during seedling stage; the grafted seedlings are placed in the environment avoiding light direct radiation with the temperature of 25-35 DEG C and the relative humidity of 85-95 percent for cultivating 5-10 days, and then are transplanted to a field with the density of 12000-18000 plants / hm2; and conventional field management is carried out after removing surplus buds on cotyledonary node position. The cotton plants formed through grafting has the advantages of high stress resistance and yield, great growth vigor in the continuous cropping cotton field, and excellent quality; moreover, by selecting the rootstocks and the scions with good affinity during cultivation, the grating survival rate is high, the costs on cultivation and improved varieties are low, and the popularization is easy.

Description

technical field [0001] The invention relates to the field of cotton cultivation, in particular to a high-yield cultivation method for cotton capable of overcoming continuous cropping obstacles. Background technique [0002] With the rapid development of my country's planting industry towards commercialization, regionalization, and specialization, the continuous cropping and repeated cropping of crops has caused more and more obstacles to the continuous cropping of cotton, tobacco, flowers and other crops, making the crops weak in growth potential and resistant. Reduced, yield decreased, quality deteriorated. The causes of continuous cropping obstacles can be summarized in the following aspects: ①The increase of harmful organisms in the soil and serious soil-borne diseases and insect pests. According to survey results, about 70% of the plots that cause continuous cropping obstacles are caused by soil-borne diseases and insect pests. In particular, the increase in the number a...

AI Technical Summary

Problems solved by technology

Although there are many studies on continuous cropping obstacles at home and abroad, and measures such as crop rotation, application of resistant varieties, soil disinfection, and rational fertilization have been proposed, they all have certain limitations, such as stubble rotation and crop rotation (such as rice and dry crop rotation). , applying more organic fertilizers, etc., although there are certain effects, but under the unique agricultural environmental conditions and farming patterns in our country, there are too many people and less land, and the competition for grain and cotton is serious, so it is difficult to popularize and apply; at present, there is almost no real performance of stable resistance in China. The ideal cotton variety should not only have high yield, high quality, but also strong stress resistance. However, high yield, high quality, and strong stress resistance are often negatively correlated. Conventional breeding should combine the above traits together. Conventional variety breeding methods that are difficult, time-consuming, and costly for seed production are becoming more and more difficult to meet the needs of current cotton production

[0004] The inventors have successfully bred grafted cotton seedlings that are immune or highly resistant to the microtubule diseases Verticillium wilt and Fusarium wilt by using the grafting method, which is highly resistant or immune to the main microtubule diseases of cotton Sea-island cotton or land-sea hybrid cotton is used as rootstock, and conventional upland cotton varieties or strains are used as scions, which are grafted at the seedling stage (see application number: 200910065924.9 for details, and the name is "a Chinese invention of the method of cultivating cotton resistant to microtubule disease patent application"). Although the grafted cotton cultivated by this method can effectively and thoroughly control the main diseases of continuous cropping cotton fields, not all grafted cotton can obtain higher yields than non-grafted cotton, and some even have lower yields than non-grafted cotton.

Images