作物学报 ›› 2014, Vol. 40 ›› Issue (08): 1506-1512.doi: 10.3724/SP.J.1006.2014.01506
许娜1,王嘉宇1,李清1,杨贤莉1,刘遵奇1,荆彦辉2,徐正进1,*
XU Na1,WANG Jia-Yu1,LI Qing,YANG Xian-Li1,LIU Zun-Qi1,JING Yan-Hui2,XU Zheng-Jin1,*
摘要:
2012—2013年以少蘖粳Ri22和沈农265为试验材料,研究每穴苗数对物质生产和抗倒伏能力的影响。结果表明,(1)少蘖粳Ri22和沈农265抽穗前和抽穗后干物质生产量及总干物重均随每穴苗数增加而增加,茎鞘和叶片物质转运率和贡献率随每穴苗数的增加而降低;(2)少蘖粳Ri22和沈农265各节间抗折力均表现为每穴2苗>每穴4苗>每穴6苗,各节间倒伏指数均表现为每穴2苗<每穴4苗<每穴6苗,差异均未达到显著水平;(3)少蘖粳Ri22和沈农265有效穗数随每穴苗数增加而显著增多,每穗粒数随每穴苗数增加而显著减少,结实率和千粒重的差异没有达到显著水平;(4)少蘖粳Ri22和沈农265的产量随着每穴苗数的增加而增加,差异未达到显著水平。为了实现高产与抗倒能力的统一,少蘖粳Ri22在沈阳地区种植适宜苗数为每穴2~4苗,而沈农265则可以适当密植。
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