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ROOT GROWTH AND MORPHOLOGY OF SWITCHGRASS (PANICUM VIRGATUM L.) AND BUSH CLOVER (LESPEDEZA DAVURICA S.) IN MIXED PLANTATION UNDER VARYING SOIL WATER AND PHOSPHORUS SUPPLY CONDITIONS
Wang, Shi-Qi1; Liu, Jin-Biao1,2; Kang, Ji-Yue3; Xu, Bing-Cheng1,3; Chen, Ying-Long1,3,4
2021-08-01
Source PublicationPAKISTAN JOURNAL OF BOTANY
ISSN0556-3321
Volume53Issue:4Pages:1227-1237
Corresponding AuthorXu, Bing-Cheng(Bcxu@ms.iswc.ac.cn)
AbstractWater and phosphorus (P) are two major factors affecting plant growth on the Loess Plateau of China. To clarify root response of introduced species to native species in mixture under varying water and P supplies would be favorable for assessing their interactions. This study investigated the effects of soil water, P and mixture ratio on root growth and morphology of switchgrass (Panicum virgatum L.) (an introduced C-4 perennial herbaceous grass) and bushclover (Lespedeza davurica S.) (a C-3 perennial leguminous subshrub) in mixtures in a pot experiment. Two soil water regimes [75 +/- 5% field capacity, FC (high water, HW) and 35 +/- 5% FC (low water, LW)], three P treatments (addition of 0, 0.05 and 0.1 g of P2O5 per kg dry soil) and 5 mixture ratios of the two species (12:0, 8:4, 6:6, 4:8, 0:12) were complemented. Results showed that switchgrass tended to decrease root average diameter (RAD) and increase specific root length (SRL) under LW comparing with HW, while bushclover showed the opposite trends. P application significantly (p<0.05) deceased the RAD of switchgrass under LW, while had no effect on SRL, resulting in a thinner root system with higher root tissue density. Regardless of soil water regimes, SRL of bushclover decreased significantly after P application. Root biomass and total root length of switchgrass were increased with the decrease of mixture ratio, while both parameters decreased in bushclover. In mixture with switchgrass, bushclover decreased SRL and proportion of fine root length (0-0.5 mm diameter class). The present study implied that switchgrass would be superior when mixed with bushclover, and P application might increase the abilities of switchgrass in competing and acquiring for limited resources.
KeywordMixture ratio Root competition Root biomass Root diameter class Specific root length
DOI10.30848/PJB2021-4(41)
WOS KeywordMEDICAGO-SATIVA L. ; LOESS PLATEAU ; PERENNIAL LEGUMES ; BIOMASS ; PLASTICITY ; MAIZE ; CHINA ; COMPETITION ; GRASSLANDS ; ALLOCATION
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0501703] ; Startup Foundation of Heilongjiang Bayi Agricultural University[XYB202009]
Funding OrganizationNational Key Research and Development Program of China ; Startup Foundation of Heilongjiang Bayi Agricultural University
WOS Research AreaPlant Sciences
WOS SubjectPlant Sciences
WOS IDWOS:000647795400010
PublisherPAKISTAN BOTANICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/162618
Collection中国科学院地理科学与资源研究所
Corresponding AuthorXu, Bing-Cheng
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Heilongjiang Bayi Agr Univ, Coll Agron, Daqing 163319, Heilongjiang, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
4.Univ Western Australia, Sch Agr & Environm, Inst Agr, LB 5005, Perth, WA 6001, Australia
Recommended Citation
GB/T 7714
Wang, Shi-Qi,Liu, Jin-Biao,Kang, Ji-Yue,et al. ROOT GROWTH AND MORPHOLOGY OF SWITCHGRASS (PANICUM VIRGATUM L.) AND BUSH CLOVER (LESPEDEZA DAVURICA S.) IN MIXED PLANTATION UNDER VARYING SOIL WATER AND PHOSPHORUS SUPPLY CONDITIONS[J]. PAKISTAN JOURNAL OF BOTANY,2021,53(4):1227-1237.
APA Wang, Shi-Qi,Liu, Jin-Biao,Kang, Ji-Yue,Xu, Bing-Cheng,&Chen, Ying-Long.(2021).ROOT GROWTH AND MORPHOLOGY OF SWITCHGRASS (PANICUM VIRGATUM L.) AND BUSH CLOVER (LESPEDEZA DAVURICA S.) IN MIXED PLANTATION UNDER VARYING SOIL WATER AND PHOSPHORUS SUPPLY CONDITIONS.PAKISTAN JOURNAL OF BOTANY,53(4),1227-1237.
MLA Wang, Shi-Qi,et al."ROOT GROWTH AND MORPHOLOGY OF SWITCHGRASS (PANICUM VIRGATUM L.) AND BUSH CLOVER (LESPEDEZA DAVURICA S.) IN MIXED PLANTATION UNDER VARYING SOIL WATER AND PHOSPHORUS SUPPLY CONDITIONS".PAKISTAN JOURNAL OF BOTANY 53.4(2021):1227-1237.
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