Effects of Row Spacing and Planting Density on Photosynthesis, Grain-filling and Yield of Coix Lacryrma-jobi

doi:10.11924/j.issn.1000-6850.casb16020007

Abstract

Abstract: In order to provide reference for high-yield cultivation of Coix lacryrma- jobi, an experiment was conducted to study the effects of 2 row-spacing (equidistant row and wide-narrow row) and 4 planting densities (70000, 60000, 50000, 40000 plants/hm2) on photosynthesis, grain-filling and yield of Coix lacryrma-jobi with two factors split plot design. The results showed that: compared with the method of the equidistant row cultivation, the method of wide- narrow row cultivation improved population structure, photosynthetic performance and capacity of grain-filling, and the yield under the 4 planting densities increased by 7.87%, 7.90%, 7.87% and 8.75%, respectively. Planting density had significant effect on the yield of Coix lacryrmajobi. The highest yield (4544.1 and 4901.9 kg/hm2 for equidistant row cultivation and wide- narrow row cultivation) were observed under 50000 plants/hm2. Thus, the best planting density was 50000 plants/hm2, and the method of wide-narrow row cultivation was an effective measure to increase the yield ofCoix lacryrma-jobi .

CLC Number:

S519

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