Comparison on the characteristics of main nutrient element contents of mountain shrubby-grassland and sowed Dactylis gomerata grassland in the valley area of Lhasa River
The characteristics of 3 main nutrient element contents (N, P, K) of mountain shrubby-grassland and sowed Dactylis gomerata grassland in the valley area of Lhasa River were studied. The major results are as flows: 1)3 main nutrient elements in the soil of mountain shrubby-grassland and sowed D. gomerata grassland are respectively in the order as total P< total N< total K and total N< total P< total K. The nutrient element K is the highest in the two soils. 2) The average value of total N in the soil of sowed D. gomerata grassland is 0. 02% lower than that of mountain shrubby-grassland, but its average values of total P and total K are respectively 0. 03% and 0. 14% higher than those of mountain shrubby-grassland. 3) The variation trend of total N and total K in the two kind soils are similar, but it is opposite for total P. 4) The contents of N, P and K in whole plant of Ko-bresia humilis and D. gomerata are in the same order as P< K< N, and the contents of N, P and K in D. gomerata are respectively 55. 81%, 200. 00% and 230. 77% higher than those of K. humilis. 5) The contents of N, P and K in shoot were higher than those in root of both K. humilis and D. gomerata.
mountain shrubby-grassland, sowed Dactylis gomerata grassland, main nutrient elements
国家科技期刊平台
NSTL
万方数据
维普
