以3个甜高粱杂交种为试材，研究6个种植密度对株高、茎粗、分蘖数、倒伏级别和生物产量的影响。结果表明：不同种植密度对3个杂交种的分蘖数、倒伏级别和生物产量的影响达到显著水平，对株高和茎粗的影响差异不显著；综合分析倒伏性和生物产量，在山东省生态条件下，济甜杂2号的最佳种植密度为5．5万株/hm2，济甜杂3号为3．3万株/hm2，辽甜3号为3．3万～4．5万株/hm2；3个杂交种在最佳种植密度下不仅生物产量最高，而且倒伏率低，有利于机械化收割。%Three sweet sorghum hybrids were used to research the effects of 6 different planting densities on plant height , stem diameter , tiller number , lodging level and biomass .Variance analysis showed that the differences in tiller number , lodging level and biomass between different densities reached significant level , while those of plant height and stem diameter were not significant .Comprehensively analyzing lodging charac-ters and biomass , the optimum planting density of Jitianza 2 , Jitianza 3 and Liaotian 3 was 55 000 , 33 000 and 33 000~45 000 plants per hectare respectively .Under the optimum planting density , the three hybrids had the highest biomass and low lodging rate which was beneficial to mechanical harvesting .
展开▼
