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为了解滴水量对中熟超高产大豆叶片光合生理特性的影响,在田间研究了盛花期后975(W_1),1 575(W_2),2 175(W_3),2 775(W_4)m~3/hm~24种滴水量处理对中熟大豆品种“新大豆27号”植株形态特征、叶面积指数、光合生理特性和产量的影响。结果表明:增加滴水量,直接提高0~40 cm土层含水量,显著增大主茎9~16节节间长和叶柄长,茎粗减小;显著增大主茎6~15节叶面积、群体中上部叶面积指数;显著增大叶片叶绿素含量、净光合速率、气孔导度、蒸腾速率,降低胞间二氧化碳浓度;显著降低叶片可溶性总糖含量和蔗糖含量,增强生育前期叶片淀粉的积累和生育后期高效的运转;W4、W3处理产量分别为6 404.7,6 082.6 kg/hm~2,分别较W1增产27.6%、21.2%。新疆伊宁地区大豆产量可达6 000.0 kg/hm~2,其生育期间田间适宜总滴水量为2 175~2 775 m~3/hm~2。
In order to understand the effects of drip irrigation on the photosynthetic characteristics of medium high - yielding soybean (Oryza sativa L.), the effects of drip irrigation on the photosynthetic characteristics of medium high - yielding soybean (Oryza sativa L.) were studied in field experiments. The effects of 975 (W_1), 1575 hm ~ 24 drip irrigation on the morphological characteristics, leaf area index, photosynthetic characteristics and yield of medium-maturity soybean variety “Xin Soyu No.27”. The results showed that increasing drip irrigation directly increased the water content in 0 ~ 40 cm soil layer, and significantly increased the length of stems and the length of petiole and the diameter of stems from 9 to 16 in main stems, and significantly increased the leaf area of main stems from 6 to 15 , Leaf area index of the upper part of the population; significantly increased chlorophyll content, net photosynthetic rate, stomatal conductance, transpiration rate, decreased intercellular carbon dioxide concentration; significantly reduced leaf soluble total sugar content and sucrose content, and increased leaf starch accumulation during early growth period And efficient operation in the later growth period. The output of W4 and W3 were 6 404.7 and 6 082.6 kg / hm ~ 2, respectively, which increased by 27.6% and 21.2% respectively compared with W1. Soybean production in Yining, Xinjiang is up to 6 000.0 kg / hm ~ 2, and the optimum total drip irrigation is 2 175 ~ 2775 m ~ 3 / hm ~ 2 in the field.