干旱地区农业研究2017，Vol.35Issue(2)：234-239,6.DOI:10.7606/j.issn.1000-7601.2017.02.38
种间相互作用对牧草间作体系生产力的影响
Effects of interspecific interactions on productivity of the intercropping system of intercropping Stylosanthes guianensis / Paspalum atratum
摘要
Abstract
To uncover effects of interspecific interactions on productivity of the intercropping system of intercropping Stylosanthes guianensis / Paspalum atratum,three treatments,respective monoculture of S.guianensis and P.atratum,P.atratum/S,guianensis reciprocal intercropping,were designed to observe difference in growth,biomass,and equivalent ratio of the biomass of the whole plant,phenology,as well as soil organic matter,total nitrogen and total phosphorus of sample plot under the three treatments in the whole growth period.The results showed the LER of biomass aboveground and underground was 3.05 and 3.52 respectively 270 days after planting in intereropping system and LER was greater than 1,which indicated that the intercropping system had its advantage.Compared with monoculture,phenology of P.atratum in intercropping system delayed for 5 days,and its growth and biomass were higher than those in monoculture.Its plant height,root length,dry yield and root yield were higher than those in monoculture by 9.67 cm,7.33 cm,345.50 g·stmin-1,131.67 g·stmin-1 respectively.Compared with monoculture,the stage of branch,flower buds and flowering of S.guianensis in intercropping system delayed for 5 days,15 days and 5 ～ 15 days respectively,and its growth and biomass were lower than those in monoculture.Its plant height,root length,root shoot ratio were lower than those in monoculture by 10.64 cm,0.54 cm,0.08,0.84 grain· strain-1,14.29 g·strain-1 and 1.48 g·strain-1.The increase in organic matter,total nitrogen and total phosphorus in the intercropping sample plot after planting was 0.039％ 0.003％ and 0.001％.The increase in organic matter and total nitrogen in monoculture of S.guianensis was 0.063％ and 0.006％ after planting.The total phosphorus decreased by 0.001％ after planting.Organic matter and total nitrogen decreased in monoculture of P.atratum by 0.017 ％ and 0.002％ after planting.It was concluded that S.guianensis used phosphobacteria for nitrogen fixation in BNF process.Phosphorus consumption led to the decrease in total phosphorus and increase in total nitrogen in monoculture of S.guianensis.关键词
种间相互作用/牧草/间作体系/生产力/土壤养分Key words
interspecific interactions/intercropping system/productivity/soil nutrient分类
农业科技引用本文复制引用
张德,龙会英..种间相互作用对牧草间作体系生产力的影响[J].干旱地区农业研究,2017,35(2):234-239,6.基金项目
国家自然科学基金项目(41361099) （41361099）
云南省应用基础研究面上项目(2008CD182)项目 （2008CD182）
云南省技术创新人才培养依托项目 （）
云南省农业科学院热区生态农业研究所科技计划项目(ROS 2008-1) （ROS 2008-1）
