两个基因型玉米间混作群体风灾倒伏后的质量表现

摘要

Using Xundan 20 (XD20,susceptible to lodging)and Xindan 68 (XD68,resistant to lodg-ing)as test materials,the lodging percentage,yield and its components under inter -and mixed -cropping systems were studied after lodging by strong wind.The results showed that the lodging percentage of XD20 un-der inter -and mixed -cropping with XD68 was lower than that under monoculture.The population yield of the inter -cropping XD68 and XD20 at the ratio of 2∶2 and 2∶4 were higher than that of monoculture ones. The population yields of mixed -cropping and inter -cropping at the ratio of 1 ∶1 were higher than that of XD20 monoculture but lower than that of XD68 monoculture.The yield per 666.7m2 of inter -cropping at the ratio of 2∶2 was the highest.%以易倒伏玉米品种浚单20（XD20）和抗倒伏玉米品种新单68（XD68）为试验材料，研究了大风倒伏后不同间（混）作种植模式下玉米群体的倒伏率、产量及其构成因素。结果表明，XD20与 XD68间（混）作群体的倒伏程度均低于 XD20单作，在2∶2和2∶4间作模式下群体产量均高于其相应单作，混作和1∶1间作群体产量均高于 XD20单作而低于 XD68，在2∶2间作模式下单产达到最高。