应用生态学报2012，Vol.23Issue(7)：1817-1824,8.
间作对桑树和谷子生长和光合日变化的影响
Effects of Morus alba and Setaria italica intercropping on their plant growth and diurnal variation of photosynthesis
摘要
Abstract
A field investigation was conducted to study the effects of intercropping Morus alba and Setaria italica on their dry matter production, land use efficiency, and diurnal variation of leaf photosynthesis. Under intercropping, the plant height, basal diameter, root length, and branch number of M. alba increased by 6.0% , 13.7% , 6. 8% , and 14. 8% , respectively, and the leaf yield of M. alba was increased by 31.3% , as compared with monoculture M. alba. In contrast, the plant height and root length of intercropped S. italica had no significant difference with those of monoculture S. italica. Intercropping enhanced the equivalent ratio and use efficiency of arable land. For both M. alba and S. italica in monoculture or intercropping, their leaf photosynthetic depression all occurred at midday (12:00) , but the leaf photosynthetic depression of monoculture M. alba was heavier than that of intercropped M. alba. Intercropping promoted the leaf stomatal conductance (gs) and water use efficiency ( WUE) of M. alba at midday, increased the photosynthetic carbon assimilation of M. alba, and inhibited the decline of M. alba leaf actual photochemical efficiency of PS Ⅱ (φPSⅡ ) , photosynthetic electron transport rate ( ETR) , and the maximal photochemical of PS Ⅱ ( Fv/Fm) , which might contribute to alleviate the leaf photosynthetic depression of M. alba at midday. It was concluded that M. alba and S. italica intercropping could obviously improve the leaf photosynthetic capacity of M. alba.关键词
间作/桑树/谷子/光合日变化Key words
intercropping/ Morns alba/ Setaria italica/ diurnal variation of photosynthesis.分类
农业科技引用本文复制引用
朱文旭,张会慧,许楠,王鹏,王师丹,牟世南,梁明,孙广玉..间作对桑树和谷子生长和光合日变化的影响[J].应用生态学报,2012,23(7):1817-1824,8.基金项目
国家自然科学基金项目(30771746,31070307)、"十二五"国家科技支撑计划项目(2011BAD08B02-3)、黑龙江省自然科学基金重点项目(ZD201105)、国家林业局重点项目(2010-29,2011-32)和东北林业大学学术名师支持计划项目资助. （30771746,31070307）
