作物学报2016，Vol.42Issue(1)：104-112,9.DOI:10.3724/SP.J.1006.2016.00104
不同行距配置方式对夏玉米冠层结构和群体抗性的影响
Effects of Different Row Spaces on Canopy Structure and Resistance of Sum-mer Maize
摘要
Abstract
In order to explore the effects of row spacing on canopy structure and stress resistance, and identify the appropriate row spacing suitable for the development of agricultural mechanization, field experiments were conducted at Fangcheng and Huixian, using three types of maize hybrids (Xianyu 335 is a high plant, Zhengdan 958 is a middle high plant, and 512-4 is a dwarf) with two plant population densities (60 000 and 75 000 plant ha–1) and five row spaces (50 cm, 60 cm, 70 cm, 80 cm, and 80 cm+40 cm). The results showed that, for treatments with equal rows spacing under the same plant density, with the increasing of row spaces, different hybrids had a leave type and decreased leaf orientation value (LOV), their growth deviated from the plant rows, and trend to perpendicular to row;canopy temperature and humidity decreased, light interception and yield were reduced as well, while resistance to disease and insect was improved. The treatments with 60 cm row spacing can reasonably coordinate the rela-tionship between the canopy microenvironment and yield, resulting in appropriate distribution of canopy leaves, suitable canopy temperature and humidity, maize light interception, especially, with the high light interception rate in the lower part of the canopy, and the significantly increased resistance to stresses, different hybrids with two densities got highest yield frequently in treatments with 60 cm of row spacing regardless of the varieties with different plant heights at planting densities, which so suitable for me-chanical farming and field management. Therefore, we suggest that 60 cm is the optimal row spacing for summer corn in the Yel-low-Huaihe-Haihe Rivers Region.关键词
行距/密度/夏玉米/小气候/抗逆性/产量Key words
Row spacing/Density/Summer maize/Microclimate/Stress resistance/Yield引用本文复制引用
苌建峰,张海红,李鸿萍,董朋飞,李潮海..不同行距配置方式对夏玉米冠层结构和群体抗性的影响[J].作物学报,2016,42(1):104-112,9.基金项目
本研究由国家现代农业产业技术体系建设专项(CARS-2-19)和国家公益性行业(农业)科研专项(HY201203100)资助。This study was supported by the Special Program of Modern Agro-industry Technology System (CARS-2-19) and the Special Fund for Agro-scientific Research in the Public Interest (HY201203100) （CARS-2-19）
