行距配置对晋中晚熟冬麦区群体冠层结构的影响  

Effects of Spacing Form on Population Canopy Structure in Jinzhong Late Maturing Winter Wheat Zone

作　　者：王爱萍[1] 董琦[1] 张凤洁[1] 苗果园[1] 

机构地区：[1]山西农业大学农学院,山西太谷030801

出　　处：《农学学报》2012年第6期1-5,共5页Journal of Agriculture

基　　金：山西省科技攻关项目"小麦抗旱新基因的分子标记与新品种选育"(20100311001-6);山西省青年基金"逆境应答相关蛋白TaMyb转录因子的研究"(2008020144)

摘　　要：为了研究晋中晚熟冬麦区不同行距配置对不同穗型冬小麦群体冠层结构的影响,选用2种不同穗型品种,在播量一致的前提下,分别采用10cm和20cm两种行距配置,研究群体叶面积指数(LAI)、群体平均叶倾角(MLIA)、群体直接辐射透过系数(TCRP)、消光系数(K)和产量的差异。结果表明:与20cm(B6)行距配置相比,采用10cm(B3)行距配置提高了2个小麦品种全生育期总LAI值、灌浆中期K和产量;降低了2个小麦品种开花期和灌浆期的MLIA。多穗型品种全生育期总LAI值高于大穗型品种。B3处理的2个生育时期MLIA表现为A1>A2。随着天顶角增加,各处理TCRP均呈现逐渐减小的趋势。大穗型品种‘山农9-1’(A1)B3处理的TCRP均值和极差均较B6减小,且均值差异显著。多穗型品种‘山农9801’(A2)B3处理TCRP均值和极差均较B6增加,均值差异不显著。B3处理对多穗型小麦的增产作用更明显。B3行距配置改善了晋中晚熟冬麦区群体冠层结构,适用于北方晚熟冬麦区。This paper mainly focused on how different spacing forms affected the population canopy structure of winter wheat with different spike types in Jinzhong late maturing winter wheat zone. Under field condition, two varieties with different spike shapes were chose for research. With the same seeding amount, spacing forms of 10 cm and＇ 20 cm were adopted respectively, and the differences of population leaf area index （LAD, mean leaf inclination angle （MLIA）, transmission coefficient for radiation penetration （TCRP）, extinction coefficient （K） as well as yield were studied. The results showed that the 10 cm spacing form could increase the overall leaf area index （LAD in whole growth stage, the K in middle stage of grouting, yield, and decreased the MLIA in flowering stage and filling stage of two wheat varieties in comparison with 20cm. The total LAI in whole growth stage of multi-spiked variety was higher than that of large-spiked variety. The MLIA of two growing stages with 10 cm （B3） spacing form was： A≥A2. The TCRP of four treatments diminished gradually with raising the zenith angle. The average and range of TCRP of l0 cm spacing form were lower than that of 20 em spacing form and two averages had much difference of large-spiked variety. The average and range of TCRP of 10 cm spacing form were higher than that of 20 cm spacing form and two averages did not have much difference of multi-spiked variety. The yield increase rate indicated that 10 cm spacing form had more obvious effect on the yield increase of multi-spiked wheat variety. B3 spacing form could optimize wheat population canopy structure in Jinzhong late maturing winter wheat zone and was suitable to northern late maturing winter wheat zone.

关 键 词：行距配置 晋中晚熟冬麦区 群体 冠层结构 

分 类 号：S512.1[农业科学—作物学]