Effect of sowing quantity and method on seedling quality and yield of Astragalus membranaceus var. mongholicus in Weiyuan, Gansu Province, Chin

doi:10.11686/cyxb2015565

Abstract

Abstract:

The aim of this study was to determine the effects of seeding density and sowing method on the quality and yield of Astragalus membranaceus var. mongholicus, to provide the basis for a normalization-cultivation technique. We used the Longqi No.2 cultivar as the experimental material. The seeds were sown at three different densities (90, 150, 210 kg/ha) using four different sowing methods (drilling, broadcast sowing, plastic mulching, and hole sowing). Then, quality indicators and yield were measured at the end of the nursery cultivation. There was a significant effect of the interaction between the seeding density and sowing method on seedling quality parameters, both at the individual and the population scale. As the sowing density increased, single seedling fresh weight, root length, and root diameter tended to decrease, seedling yield first increased and then significantly decreased, and seedling number increased while the proportion of superior seedlings decreased significantly. Under the same sowing density, the plastic mulching and hole sowing methods showed the best performance, in that the proportions of superior seedlings were higher than those obtained using the drilling and broadcast sowing methods. As the seeding density increased, the seedling yield first increased and then decreased when the plastic mulching and hole sowing methods were used, but tended to decrease when the drilling and broadcast sowing methods were used. At the seeding density of 150 kg/ha, the largest number of superior seedlings per unit area was achieved using the plastic mulching and hole sowing methods. These results show that seeds of A. membranaceus var. mongholicus should be sown at a density of 150 kg/ha and cultivated using the plastic mulching or hole sowing methods for the best results in Weiyuan.

MI Yong-Wei, CAI Zi-Ping, WU Wei-Guo, WANG Guo-Xiang, WANG Hong-Xia, PENG Yun-Xia, GONG Cheng-Wen, WEI Li-Xia. Effect of sowing quantity and method on seedling quality and yield of Astragalus membranaceus var. mongholicus in Weiyuan, Gansu Province, Chin[J]. Acta Prataculturae Sinica, 2016, 25(7): 196-202.

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