不同基因型玉米间作复合群体生态生理效应  

Ecophysiological Characterization of Different Maize (Zea mays L.) Genotypes under Mono- or Inter-cropping Conditions

作　　者：李潮海[1] 苏新宏[1] 孙敦立[1] 

机构地区：[1]河南农业大学农学院,郑州450002

出　　处：《生态学报》2002年第12期2096-2103,共8页Acta Ecologica Sinica

基　　金：河南省"九五"重点科技攻关资助项目 (960 2 0 1 0 1 9)

摘　　要：连续两年 (1 998～ 1 999)根据不同基因型玉米株形的差异和对抗病虫、抗倒伏以及对水分胁迫适应性的差异进行了组合间作试验。结果表明 ,合理间作的复合群体后期抗逆能力明显提高 ,其抗病虫、抗倒伏能力和对干旱的适应能力增强。复合群体在后期可维持较高的叶日积 (LAI-D)、叶绿素 (Chl)含量和光合速率 (Pn) ,土地当量比 (LER)有所提高 ,因此有利于实现玉米的高产和稳产。Reduced genetic variability of crop cultivars, which is indicated by similar genetic bases among leading varieties, has resulted in fragile recovery mechanisms, increased presence and severity of plant disease and pest damage, and increased lodging, especially in maize. Variation in climatic conditions between years in China, which cause drought or water logging depending on the year, can result in very variable yields per unit area. Therefore, we propose increased maize genetic diversity is important to consistently produce the highest possible yield over a large area. This experiment was conducted at the Institute of Wenxian Agricultural Science and the Institute of Changge Agricultural Science in Henan Province in 1998 and 1999, respectively. The experiment at both locations was a complete randomized block design with three replications. There were six and fourteen treatments, respectively. Maize hybrids with different architecture and level of resistance to pests were planted in mono\| and inter\|cropping systems. For the intercropping, the ratio of the two hybrids involved was 1∶1 in a 72～48 cm of paired row spacing. The total area per plot was 50 4m 2. The experiment was planted on June 10 and harvested on September 22 in both years. Cultivation and management of the test plots were the same as those of local fields throughout the experiment. For both locations, the test cultivars were chosen according to differences in their morphological and. physiological characteristics (e.g. plant type, resistance, etc). Among them, Danyu13 (denoted as DY13) is a panar variety; Denghai1 (DH1) is a compact variety; YuYu22 (YY22) showed good disease resistance but poor pest and lodging resistance; YuYu20 (YY20) had both poor disease and poor pest resistance but good lodging resistance; Denghai1(DH1) exhibited poor disease and pest resistance but good lodging resistance; YuYu21(YY21) had good disease and pest resistance but poor lodging resistance; Yedan2 (YD2) had low yield potential but better droug

关 键 词：基因型 玉米 间作 复合群体 生态生理效应 

分 类 号：S513[农业科学—作物学] S314