The effects of different planting density(75 000,150 000,225 000,300 000 plant per ha) on dry matter accumulation of Zhangzagu 5 were studied. The results showed that the dry matter accumulation of Zhangzagu 5 showed the slow-quick-slow trend during the whole growth period;under the planting den-sity of 150 000 plant per ha,the dry matter accumulation of Zhangzagu 5 was 100. 82 g per plant, the dry matter accumulation of spike per plant was 79. 94 g,the transportation rate of leaf and stem were 24. 73%and 26 . 82%, the contribution rate to seed of leaf and stem were 8 . 55% and 14 . 87%, the yield was 7 477. 37 kg/ha,overall,all indexes of Zhangzagu 5 under the planting density of 150 000 plant per ha were higher than that under the other three planting densities. The planting density of 150 000 plant per ha was the best planting density for Zhangzagu 5 .%设4个密度水平(75000、150000、225000、300000株/hm2),研究了不同种植密度对张杂谷5号干物质积累的影响,结果表明,张杂谷5号在整个生育期干物质积累呈慢—快—慢型,150000株/ hm2密度下成熟期单株干物质积累总量为100.82 g/株,穗部干物质质量为79.94 g/株,叶、茎运转率为24.73%、26.82%,叶、茎对籽粒的贡献率为8.55%、14.87%,产量为7477.37 kg/hm2,各项指标均高于其他3个种植密度,150000株/ hm2为张杂谷5号的最佳种植密度。
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