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

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

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。

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/hm^2） on photosynthesis, grain-filling and yield of Coix lacryrma-jobi withtwo factors split plot design. The results showed that： compared with the method of the equidistant rowcultivation, the method of wide- narrow row cultivation improved population structure, photosyntheticperformance 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 rowcultivation） were observed under 50000 plants/hm^2. Thus, the best planting density was 50000 plants/hm2, andthe method of wide-narrow row cultivation was an effective measure to increase the yield of Coix lacryrma-jobi.