作物学报Issue(9)：1426-1434,9.DOI:10.3724/SP.J.1006.2015.01426
豆科-燕麦间作对作物光合特性及籽粒产量的影响
Effects of Legumes Intercropping with Oat on Photosynthesis Characteristics of and Grain Yield
摘要
Abstract
Intercropping, a commonly used agronomic management by farmers in China for centuries can improve light, heat, water and nitrogen utilization efficiencies and significantly enhance crop yield. To reveal the mechanism of photosynthesis in soybean–oat and peanut–oat intercropping systems, we conducted a two-year (2011, 2012) field experiment in Baicheng, Jilin province. Under the nitrogen-free condition, crop yield, yield components and photosynthesis and relative chlorophyll content (SPAD) of functional leaves in crops were investigated during growth stage. The results showed that land equivalent ratio (LER) was from 1.41 to 1.63 and from 1.31 to 1.52 for soybean–oat and peanut–oat intercropping, respectively. Also, most yield compo-nents from oat (plant height, spike length and spikelet, grain number per spike) under intercropping with soybean were higher than those from mono-cropping oat, except for grain weight per plant and thousand seed weight. Under intercropping with peanut, all yield components of oat increased in comparison with those under mono-cropping oat and spikelet, grain number per spike and grain weight per plant showed significant difference. Moreover, all yield components of soybean intercropping with oat improved, whereas decreased peanut pod number and grain weight per plant. As for photosynthesis, intercropping enhanced chlorophyll content and net photosynthetic rate of oat and altered chlorophyll composition which contributed to the slower process of oat ag-ing. With regard to peanut, chlorophyll content slightly increased when intercropped with oat and net photosynthetic rate signifi-cantly improved during the late booting stage to heading stage of oat. In conclusion, under the condition of nitrogen-free, inter-cropping is demonstrably superior to monoculture. The peanut-oat intercropping system notably promotes the growth of oat, while the oat and soybean are both benefit from the soybean-oat intercropping system.关键词
燕麦/大豆/花生/间作/光合特性/产量Key words
Oat/Soybean/Peanut/Intercropping/Photosynthesis characteristics/Yield引用本文复制引用
冯晓敏,杨永,任长忠,胡跃高,曾昭海..豆科-燕麦间作对作物光合特性及籽粒产量的影响[J].作物学报,2015,(9):1426-1434,9.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-08-B-1),国家自然科学基金项目(30871491,31171509)和国家公益性行业(农业)科研专项经费项目(201103001)资助。 （CARS-08-B-1）
