[Nutritional characteristics of Caragana jubata shrub and distribution patterns of soil nutrients in Luya Mountain].
The study on the nutrient components of Caragana jubata shrub and the distribution patterns of soil nutrients in Luya Mountain of Shanxi Province showed that C. jubata was a valuable feeding plant, which contained 20.27% of crude protein and 5.12% of ash with abundant Ca, Fe and Mn. The crude protein, ash, and mineral element contents increased from May and achieved the highest in July when C. jubata was at flowering stage, and then declined. To adapt to the habitat in subalpine meadow with high altitude, low temperature and thin soil layer, C. jubata had "fertility island" effect. The electric conductivity and the contents of organic matter, total N, available P and available K in the center of "fertility island" increased by 18.8%, 16.4%, 18.7%, 16.6% and 8.4%, respectively, compared with those in the edge of the "fertility island". The organic matter content and total N content in rhizosphere increased, while the contents of available nutrients such as P, K, Fe and Mn decreased, suggesting that C. jubata had high capability of N fixation and nutrients uptake.
Zhang
Qiang
Q
Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China. qzhang@ppi.caas.ac.cn
Cheng
Bin
B
Yang
Zhiping
Z
Gao
Chunhua
C
Zhang
Yigong
Y
Zhang
Lizheng
L
D002118:Calcium / Q000032:analysis*; D032602:Caragana / Q000254:growth & development* / Q000378:metabolism; D007501:Iron / Q000032:analysis*; D008345:Manganese / Q000032:analysis*; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D012987:Soil / Q000032:analysis*
D012987:Soil; D008345:Manganese; D007501:Iron; D002118:Calcium