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楚光红,章建新,唐长青,等.密度对中熟春大豆冠层结构及光合特性的影响[J].中国农学通报,2018,34(18):16-22.,et al.Density Affecting Canopy Structure and Photosynthetic Characteristics of Medium Maturity Spring Soybean[J].Chinese Agricultural Science Bulletin,2018,34(18):16-22
密度对中熟春大豆冠层结构及光合特性的影响
Density Affecting Canopy Structure and Photosynthetic Characteristics of Medium Maturity Spring Soybean
投稿时间:2017-05-08  修订日期:2018-06-05
DOI:10.11924/j.issn.1000-6850.casb17050035
中文关键词: 密度  滴灌  春大豆  冠层结构  光合特性
英文关键词: Density  Drip irrigation  Spring soybean  Canopy Structure  Photosynthetic characteristics
摘要点击次数: 330
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基金项目:国家自然科学基金项目“大豆根系生长与花荚形成关系研究”(31460333)。
作者单位E-mail
楚光红 新疆农业大学农学院 597917983@qq.com 
章建新 新疆农业大学农学院 zjxin401@126.com 
唐长青 新疆阿克苏地区农业技术推广中心 1262599677@qq.com 
高 阳 新疆农业大学农学院 610692322@qq.com 
傅积海 新疆农业大学农学院 1290155843@qq.com 
中文摘要:
      为明确种植密度对滴灌中熟春大豆冠层结构及光合特性的影响规律。试验以中熟春大豆品种‘新大豆27号’和品系‘11-109’为试验材料,大田条件下设置18.0 (D1)、28.5 (D2)、36.0 (D3) 万株/hm2 3个不同种植密度,并对其群体上、中、下三个冠层的叶面积指数、叶绿素含量(SPAD值)、净光合速率、干物质积累量及产量做了系统测定。结果表明,密度由D1增加到D2,叶面积指数、干物质积累量、产量均显著增加;密度由D2增至D3,叶面积指数继续增加,而干物质和产量不再继续增加;增加密度明显降低植株7节以下叶片的叶绿素含量和净光合速率,提高结荚节位,降低单株粒数、粒数和经济系数;新大豆27号的叶面积指数、干物质积累、叶片光合速率等对密度的响应不如11-109敏感。D2是两品种(系)的适宜密度,新大豆27号籽粒产量为5551.13 kg/hm2,较11-109高14.73%。超高产春大豆品种的冠层结构、光合特性及产量对密度的响应不如高产品种敏感。
英文摘要:
      The aim is to investigate the effect law of planting density on canopy structure and photosynthetic characteristics of medium maturity spring soybean under drip irrigation.‘Xindadou 27’and‘11-109’were used as the experiment materials, and three densities [18.0×104 (D1), 28.5×104 (D2), 36.0×104 (D3)/hm2] were set in the field experiment, and the canopy leaf area index (LAI ), chlorophyll content (SPAD ), net photosynthetic rate (Pn ), dry matter accumulation and yield were determined systematically under different treatments. The results showed that with the density increased from D1 to D2,LAI , dry matter accumulation and yield increased significantly; with the density increased from D2 to D3,LAI continued to increase, while dry matter and yield no longer increased. With the planting density increasing,SPAD andPn of leaves below the seventh joint position decreased significantly, and the podding position was raised. Besides, grain number per plant, grain number and economic coefficient also decreased significantly;‘Xindadou 27’was not sensitive to density change compared with‘11-109’onLAI , dry matter accumulation andPn . D2 was the suitable density for the two varieties (strains) of spring soybean, the grain yield of‘Xingdadou 27’was 5551.13 kg/hm2, which was 14.73% higher than that of‘11-109’. The responses of canopy structure, photosynthetic characteristics and yield of super-high yield varieties to planting density were not as sensitive as those of high yield varieties.
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