35 results about "Defoliant" patented technology

The invention provides a suitable machine picking group construction method of dripping irrigation cotton fields in Tarim Basin of South Xinjiang. The method comprises the steps of variety selection, plant row spacing and density configuration, irrigation and fertilizer application of cotton fields with different growing conditions, mepiquat chloride using method formulation and the like. A cotton variety constructed by a machine picking dripping irrigation cotton field group is put forward. The growth period is 131-136 days. The group has a rapid sensitivity to a defoliant; particularly, several days after spraying the defoliant, the leaf defoliation rate of the cotton field group is up to 91.2-94.5 %; the leaf inclination angle in the variety setting period is 46.5-65.1 degrees; the internode distance of fruit branches is 7-12 cm; the leaf size is medium and small; bracts are small; cotton leaves are good, and fluffs on the back of the cotton leaves are few; the ground clearance of cotton bolls at the lowermost portion of cotton plants is 18.0-22.0 cm; the covering of mulching films, and the planting mode of wide and narrow row or equal row spacing are used while planting. According to the method, not only are the leaf defoliation rate of the cotton leaves, the picking net rate of the machine picking, the fiber length of processed ginned cotton, the fiber strength of the processed ginned cotton and the picking efficiency increased, but also the loss rate of the machine picking and the impurity rate of seed cottons are reduced, and the production requirements are completely met.