川中丘陵区套作玉米适宜种植密度研究

为探索川中丘陵区套作春玉米的适宜种植密度,通过田间试验,研究不同种植密度对玉米叶面积、干物质积累、倒折率及产量的影响.结果表明:玉米单株绿叶面积和单株干物质积累随着密度增加而降低,群体干物质和叶面积随着密度增加而增加,种植密度对群体的调控效应大于单株.‘成单30’种植密度由3.75×104株/hm2增加至6×104株/hm2,产量随着密度增加而增加;但超过6×104 株/hm2后,穗粒数、百粒重显著降低,茎秆倒折率显著上升,从而导致玉米减产.小麦玉米套作“双三O”种植模式下,供试品种“成单30”获得较高产量的种植密度为5.25×104~6×104株/hm2,高产群体结构指标吐丝期LAI为4.7...

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Published in西南农业学报 Vol. 26; no. 5; pp. 1814 - 1818
Main Author 陈尚洪 陈红琳 沈学善 王昌桃 刘定辉
Format Journal Article
LanguageChinese
Published 四川省农业科学院土壤肥料研究所,四川成都610066 2013
南方丘区节水农业研究四川省重点实验室,四川成都610066%四川省农业科学院土壤肥料研究所,四川成都,610066%四川省农业科学院土壤肥料研究所,四川成都610066
四川农业大学,四川雅安625014
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Summary:为探索川中丘陵区套作春玉米的适宜种植密度,通过田间试验,研究不同种植密度对玉米叶面积、干物质积累、倒折率及产量的影响.结果表明:玉米单株绿叶面积和单株干物质积累随着密度增加而降低,群体干物质和叶面积随着密度增加而增加,种植密度对群体的调控效应大于单株.‘成单30’种植密度由3.75×104株/hm2增加至6×104株/hm2,产量随着密度增加而增加;但超过6×104 株/hm2后,穗粒数、百粒重显著降低,茎秆倒折率显著上升,从而导致玉米减产.小麦玉米套作“双三O”种植模式下,供试品种“成单30”获得较高产量的种植密度为5.25×104~6×104株/hm2,高产群体结构指标吐丝期LAI为4.72 ~5.41,吐丝期群体干物质为6330.98 ~ 6898.80 kg/hm2,成熟期群体干物质为16541.33~16616.25 kg/hm2.
Bibliography:Spring maize;Mulching method;Dry matter;Accumulation;Yield
CHEN Shang-hong(Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Sichuan Chengdu 610066, China;Procincial Key Laboratory of Water-saving Agriculture in Hilly Areas of Southern China, Sichuan Chengdu 610066 ,China) CHEN Hong-lin(Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Sichuan Chengdu 610066, China) SHEN Xue-shan(Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Sichuan Chengdu 610066, China) WANG Chang-tao(Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Sichuan Chengdu 610066, China) LIU Ding-hui(Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Sichuan Chengdu 610066, China;Sichuan Agricultural University, Sichuan Ya'an 625014, China)
51-1213/S
A field experiment was carried out to investigate the effect of different plant densities on spring maize green leaf area,dry matter accumulation,root lodging percentage,stalk breaking pe
ISSN:1001-4829