摘要
以郑单958、金海5号为试验材料,研究在中密度(52500株/hm2)、高密度(75000株/hm2)条件下对茎秆和穗部性状的影响。结果表明:高密度条件下,两个品种株高和穗位高受影响均不显著,除第1节间茎秆长度显著增加外,其他节间受密度影响不显著,而基部(第3节间)茎的粗度显著减少;中密度条件下,金海5号各节间茎秆穿刺强度均显著大于郑单958。高密度条件下,金海5号各节间茎秆穿刺强度显著减弱,而郑单958除第3节间穿刺强度显著减弱外,其他节间没有明显变化。高密度条件下,穗长、行粒数和百粒重都显著降低。两个品种在高密度下的产量均显著高于中密度。
Two high-yield maize cultivars Zhengdan958 and Jinhai 5 were used for this study with two plant density treatments, medium density（52 500 plants/ha） and high-density（7 5000 plants/ha） under field condition, and the effects of plant density on the characteristics of stem and ear were studied. The results showed that the high density did not affect the plant height and ear height, and except the first internode, the length of the other internodes was unaffected by the high density, but the stem diameter of the third internode decreased. Under medium plant density （52 500 plants/ha） condition, Jinhai 5 showed higher rind penetration strength of all internodes than Zhengdan958. Under high density condition, the rind penetration strength of Jinhai 5 decreased obviously, while Zhengdan958 was unchanged, except that the rind penetration strength of the third internode decreased. The ear length, the kernel number per line and hundred-kernel weight obviously decreased under high density condition, but the two cultivars both reached the highest yield under higher plant density.
出处
《玉米科学》
CAS
CSCD
北大核心
2009年第5期130-133,共4页
Journal of Maize Sciences
基金
国家科技支撑计划(2006BAD29B02)
山东省优秀中青年科学家科研奖励基金项目(2006BSB01452)
农业部结构调整重大技术研究专项(06-03-02B)
关键词
玉米
茎秆
穿刺强度
Maize
Stem
Rind penetration strength
