行距配置和种植密度对薏苡光合生理、籽粒灌浆及产量的影响

为薏苡高产栽培提供参考依据，采用2 因素裂区设计，设置2 种行距（等行距、宽窄行）和4 种密度（7 万、6 万、5 万、4 万株/hm2），研究不同的种植方式对薏苡花后光合生理、籽粒灌浆及产量的影响。结果表明：宽窄行种植改善了薏苡的群体结构，提高了叶片光合性能和籽粒灌浆能力，与等行距种植的薏苡相比，4 种密度种植的薏苡产量分别提高7.87%、7.90%、7.87%和8.75%；种植密度对薏苡产量影响显著，2 种行距配置的薏苡都以种植密度为5 万株/hm2时产量最高，分别达到4544.1、4901.9 kg/hm2。薏苡的适宜种植密度为5万株/hm2，宽窄行种植是薏苡高产栽培的有效措施。

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

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 .