中国林副特产Issue(1)：5-9,5.DOI:10.13268/j.cnki.fbsic.2016.01.002
桔梗间作模式中作物养分吸收和利用对间作优势的贡献
Uptake and Conversion Efficiencies of NPK and Corresponding Contribution to Intercropping Advantage in Platycodon grandi f lorum Based Intercropping Systems
摘要
Abstract
The uptake and conversion efficiency of N ,P and K were assessed in Platycodon grandiflorum /Allium f istulosum L .,P .grandif lorum /Mentha arvensis L .intercropping system ,and the corresponding monocropping systems ,the intercropping advantage and nutrient uptake and conversion of cropping system were determined .The results showed that compared with weighted mean of monocultured crops of sole cropping system ,P .grandif lorum/A . f istulosum increased N and K uptake by 1 .07% ,19 .48% .However ,P .grandiflorum /M .arvensis decreased N and K uptake by 15 .79% ,1 .33% ,respectively .Phosphorus uptake under intercropping systems of P .grandi‐florum /A.fistulosumandP.grandiflorum / M.arvensiswerehigherthanthoseunderthecorrespondingsole croppingsystemsby0.67% and0.69% ,respectively.Theequivalentratioof P.grandiflorum/A.fistulosumwas 1 .21 and P .grandiflorum was the dominant species with more competitive ability relative to A .fistulosum ,indi‐cating a significant intercropping advantage and favoring increase yield of P .grandif lorum .However ,it was 0 .93 in P .grandif lorum /M .arvensis intercropping system ,indicating no intercropping advantage .The contributions of the uptake efficiencies of N ,P and K were 0 .05 ,0 .04 and 0 .23 in P .grandif lorum /A . f istulosum intercrop‐ping system and the corresponding conversion efficiencies were 0 .39 ,0 .38 and -0 .04 ,respectively ,indicating that theintercroppingadvantageof P.grandiflorum/A.fistulosumintercroppingsystemwasmainlyfromenhancedN and P conversion efficiency and K uptake efficiency .The contribution of the uptake efficiencies of N ,P and K were-0 .23 ,-0 .13 and -0 .12 ,consequently ,it could be the main reason why no intercropping advantage were existed in P .grandif lorum /M .arvensis intercropping system .关键词
桔梗/间作优势/养分吸收量/养分利用效率/土地当量比Key words
Platycodon grandi f lorum/Intercropping advantage/Nutrient uptake/Nutrient conversion efficiency/Land equivalent ratio分类
农业科技引用本文复制引用
祝丽香,张文静,王鹏,毕建杰..桔梗间作模式中作物养分吸收和利用对间作优势的贡献[J].中国林副特产,2016,(1):5-9,5.基金项目
山东省自然科学基金项目资助 （）
