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Effects of simulated nitrogen deposition on nutrients absorption and growth of Curcuma wenyujin Y. H. Chen et. C. Ling(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 05
Page:
1-12
Research Field:
Articles
Publishing date:

Info

Title:
Effects of simulated nitrogen deposition on nutrients absorption and growth of Curcuma wenyujin Y. H. Chen et. C. Ling
Author(s):
LIU Xinming1 RONG Hai3 WU Chengzhen2** HONG Wei1 LIN Yongming1 & LI Jian1**
1 College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2 College of Ecology and Resource Engineering, Wuyi University, Nanping 354300, China
3 Shanxi Hualongshan National Nature Reserve Administration, Ankang 725000, China
Keywords:
nitrogen deposition biomass photosynthesis nutrition Curcuma wenyujin Y. H. Chen et. C. Ling
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2018.12033
DocumentCode:

Abstract:
In order to understand the effects of different degrees of nitrogen deposition on nutrient uptake and growth of Curcuma wenyujin, nitrogen deposition was simulated by applying NH4NO3 with four gradients [N, 0 kg hm-2 a-1 ( CK), 50 kg hm-2 a-1 ( T50), 100 kg hm-2 a-1 (T 100) and 150 kg hm-2 a-1 (T 150)] to Curcuma wenyujin Y. H. Chen et. C. Ling, which is a authentic Chinese herbal medicine. The nutrient content, growth index and photosynthetic index of Curcuma wenyujin were measured after sampling. The results showed that: 1) Simulated nitrogen deposition had no effect on the total N content, the content and distribution of N, P and K in various parts, and the N/K ratio of Curcuma wenyujin. In August, September and December, the P content of nitrogen deposition treatment was significantly ( P < 0.05) lower than CK. In July and August, the K content of T100 and T150 treatment was significantly ( P < 0.05) higher than CK. T100 and T150 treatment increased the N/P ratio and reduce the P/K ratio. 2) In August, September and October, nitrogen deposition significantly ( P < 0.05) promoted the growth of above-ground part and root number of Curcuma wenyujin, and had no effect on the main rhizome. In July, August and September, nitrogen deposition significantly (P < 0.05) reduced the content of chloropoyll a and carotene. Nitrogen deposition had no effect on chloropoyll b content and stomatal conductance (Gs), but significantly (P < 0.05) increased photosynthetic area and net photosynthetic rate (Pn). Nitrogen deposition significantly (P < 0.05) promoted the growth of above-ground biomass of Curcuma wenyujin. In September and October, nitrogen deposition significantly (P < 0.05) promoted the growth of underground and whole plant biomass of Curcuma wenyujin, and had no effect on the ratio of above-ground biomass to underground biomass, medicinal yield and medicinal components. In general, nitrogen deposition has a certain effect on nutrients uptake and could promote plant growth in Curcuma wenyujin. The experimental results can provide data reference for field fertilization management and expanding the cultivation area of Curcuma wenyujin in the mild acid rain area under the environment where subtropical nitrogen deposition aggravated.

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Last Update: 2019-03-13