【作者】 曹敏建； 闫洪奎； 许玉凤；

【Author】 Cao Minjian;Yan Hongkui;Xu Yufeng Shenyang Agricultural University,China Liaoning,110161

【机构】 沈阳农业大学；

【摘要】 在高密度栽培条件下,改变玉米植株的田间排列方式,将清种改为二比空栽培并以清种为对照进行研究发现,二比空栽培由于疏密不等排列,使群体受光强度增大,尤其是中、下部叶片受光强度更优于清种,在空垄空间分布的中、下部叶片,其光合强度高,处于原垄内叶片光合强度虽低,但其平均光合强度远高于清种;二比空栽培的玉米,各时期叶面积指数均大于清种,尤其是中后期的正常生长,故有利于玉米灌浆;二比空栽培的玉米,根系和茎叶干重下降速度较慢,从而保证了后期的正常生长;二比空栽培根冠比小于清种;多点试验结果表明,二比空比清种增产11.2%～12.3%。更多还原

【Abstract】 On the high density culture condition of maize, 2-0 culture was studied in comparison with uniformculture. It was discovered that: because of the uneven sparse-dense arrangement, the light-intensity increased inthe population of 2-0 culture; particularly in the middle-lower part, the leaves got more light than that of theuniform culture, the middle lower leaves distributed upon the in occupied ridges had of uniform culture, althoughthe average photosynthetic is higher than that of uniform culture, although the leaves distributed upon the occupied ridges had lower photosynthetic intensity; the leaf-area index was higher in 2-0 culture than that inuniform culture in every stage, particularly the middle-later stage, hence beneficial to seed-filling, the dry-weightof root system and straw decreased slower in the middle-later stage for 2-0 culture, which for 2-0 culture. It wasproved in hm21ti-point experiment that the yield increased 11.2%-12.3%in 2-0 culture than that in uniformculture.更多还原