%0 Journal Article
%T Photosyntheticcharacterization and yield of summer corn (Zea mays L.) during grain filling stage under different planting pattern and population densities<br>不同群体结构夏玉米灌浆期光合特征和产量变化
%A WEI Li
%A XIONG Youcai
%A MA Chao
%A ZHANG Huiqin
%A SHAO Yang
%A LI Pufang
%A CHENG Zhengguo
%A WANG Tongchao
%A <br>卫丽
%A 熊友才
%A 马超
%A 张慧琴
%A 邵阳
%A 李朴芳
%A 程正国
%A 王同朝
%J 生态学报
%D 2011
%I 
%X Population structure is one of the important factors affecting photosynthetic efficiency and yield formation of crop plants. A 3 x 4 factorial field experiment with maize (Zea mays L.) was arranged in a split plot design with 4 replications. Three population densities (75000, 90000, 105000 plants/hm2) were assigned in the main plots, each of which was divided into four subplots to host the planting patterns: 1) even plant spacing in a conventional 60 cm row, 2) double plants in a triangle arrangement in the same 60cm row spacing, 3) even plant spacing in a twin-row arrangement with 50 cm within each twin-row and 70 cm row spacing between two twin-rows, and 4) similar to 3), but with double plants in a triangle arrangement within each row in the twin-row arrangement. During the grain filling period, photosynthesis and chlorophyll fluorescence parameters were measured. The results showed that under the high plant density, canopy apparent photosynthesis of double-plant planting pattern in the twin-row treatment was higher (P < 0.05) than that of the even plant spacing in the conventional 60 cm row spacing. With increasing plant densities, the values of Fv/Fm, and qP were all reduced slightly to significantly, there were larger reductions in the chlorophyll florescence parameters in twin-row than in single row planting patterns, and in double-plant planting pattern than in the equal-distance single row plant spacing. The 90000 plants/hm2 density in double-plant planting pattern and twin-row spacing arrangement had the greatest canopy photosynthetic productivity and greater yield.
%K summer maize (Zea mays L
%K )
%K population
%K photosynthetic performance
%K fluorescence
%K yield<br>夏玉米
%K 群体
%K 光合
%K 荧光
%K 产量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=3F9E736FA3096F021065C5371750AD31&yid=9377ED8094509821&vid=4AD960B5AD2D111A&iid=9CF7A0430CBB2DFD&sid=16A32B3F11A2E663&eid=2A7EF1CE25A495B2&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=28