茬口对不同专用小麦品种产量及个体和群体生长动态的影响

Effect of Crop for Rotation on Yield of Special Usage Wheat Variety and Dynamic Growth of Individual and Population

在山西临汾建立了大豆、油葵、玉米和休闲4个茬口。对不同茬口下的8个不同专用小麦品种的产量及个体和群体发育的影响进行了研究。结果表明:产量性状适宜大豆茬口的品种1个,玉米茬口2个,油葵茬口3个,休闲茬口2个。8个品种在各茬口的平均产量以玉米茬最高5985.0 kg/hm2,大豆茬最低5602.5 kg/hm2。个体生长冬前表现较好的为油葵茬,拔节期表现较好的为玉米茬。不同茬口对同一品种的群体消长动态影响不同,不同品种间的群体消长动态存在差异。

Four corns for rotation were constructed in Linfen,Shanxi Province;they were soybean for rotation,oil sunflower for rotation, corn for rotation and fallow field. We studied yield, individual and population development of eight special usage wheat varieties under different corps for rotation. The results showed that there was one variety suited to soybean for rotation on yield, two suitable to corn for rotation, three adapting to oil sunflower for rotation and two varieties fit for fallow field. The corn for rotation gained the tallest mean yield 5985.0 kg/hm^2 in all crops for rotation;the soybean for rotation was the lowest mean yield 5602.5 kg/hm^2. The oil sunflower for rotation had better individual growth performance before winter; the corn for rotation was better at jointing stage. Population dynamics of the same variety existed difference under various crops for rotation, so did the different varieties.