Method for harvesting seeds of Leymus chinensis Tzvel quickly and efficiently

Abstract

The invention discloses a method for harvesting seeds of Leymus chinensis Tzvel quickly and efficiently. The method includes the following steps of: (1) performing irrigation in an elongation stage, in a flowering stage, after harvest of a first crop of Leymus chinensis Tzvel and one month before winter, and applying humic acid combined fertilizer and urea in the elongation stage and after the harvest of the first crop of Leymus chinensis Tzvel; (2) arranging harvest when color of most of the seeds changes from light yellow to yellowish-brown, grain falling occurs when spikes are grabbed by hand and pulled gently, and the water content of the seeds is below 18%; (3) selecting a combine harvester, adjusting the rotary speed of a cleaning fan to a low gear, maintaining a height at 45 cm above the ground and a harvest speed at 5 km/h, and performing harvest; and (4) performing sieving and cleaning after sun-curing of the seeds. The method is simple, easy, efficient and economical, and canbe widely promoted in fields for producing seeds of the same Leymus chinensis Tzvel in northern China; not only can the whole country be provided with more high-quality seed sources, but also the pace of the application of Leymus Chinensis Tzvel of the Chinese Academy of Sciences in ecological improvement and artificial grassland construction can be accelerated.

Description

technical field [0001] The invention relates to a method for harvesting Leymus chinensis seeds, in particular to a mechanized method for quickly and efficiently harvesting Leymus chinensis seeds. Background technique [0002] Leymus chinensis, also known as Alkali grass, is a perennial gramineous grass with the advantages of cold and drought tolerance, salt and alkali tolerance, and barren tolerance. Leymus chinensis has good palatability, and cattle, horses and sheep are particularly fond of eating it. It is known as the "king of grass grasses", and the supply has been in short supply for a long time. The Zhongke series Leymus chinensis developed by the Institute of Botany, Chinese Academy of Sciences has overcome the three low problems of low earing rate, low germination rate, and low seed setting rate of Leymus chinensis, and has achieved saline-alkali land improvement, degraded grassland restoration, desertification control, forest Planting and other utilization modes. ...

AI Technical Summary

Problems solved by technology

At present, there is a large demand for Leymus chinensis seeds in the market, and the efficiency of artificially harvesting seeds is low and the cost is high. The loss rate of other mechanically harvested Leymus chinensis seeds is as high as 30-40%, and the stems and leaves of Leymus chinensis seeds are still in an evergreen state during harvesting. It brings difficulties to the cleaning after mechanical harvesting, so it is necessary to speed up the development of mechanized harvesting technology for Leymus chinensis seeds, improve the harvesting efficiency of Leymus chinensis seeds, and at the same time solve the impurity removal work in mechanized harvesting, improve the cleaning rate of high-quality seeds, and facilitate post-processing and sowing