|Table of Contents|

Effect of nitrogen and phosphorus fertilization on leaf N and P stoichiometric characteristics of Machilus pauhoi seedlings*(PDF)

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

Issue:
2016年22卷02期
Page:
285-291
Research Field:
Articles
Publishing date:
2016-04-25

Info

Title:
Effect of nitrogen and phosphorus fertilization on leaf N and P stoichiometric characteristics of Machilus pauhoi seedlings*
Author(s):
LI Man1 2 JIN Bingjie1 2 ZHONG Quanlin1 2 3 MA Yuzhu1 2 LU Hongdian1 2 GUO Bingqiao1 2 ZHENG Yuan1 2 & CHENG Dongliang1 2 3**
1College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China 2State Key Laboratory Breeding Base of Humid Subtropical Mountain Ecology, Fuzhou 350007, China 3Fujian Provincial Key Laboratory of Plant Ecophysiology (Fujian Normal Unive
Keywords:
Machilus pauhoi seedlings fertilization ecological stoichiometry leaf nutrients soil nutrients N:P
CLC:
Q945.79
PACS:
DOI:
10.3724/SP.J.1145.2015.06022
DocumentCode:

Abstract:
For a comprehensive understanding of the nutrient conservation mechanism of Machilus pauhoi in the subtropical zone, we need to know the response of leaf nutrient contents to fertilizers. This paper aimed to study the effect of nitrogen and phosphorus fertilization on leaf N and P stoichiometric characteristics of M. pauhoi seedlings. A microcosm experiment with N and P fertilization was designed to observe the dynamic change of leaf N, P content and their correlation with soil nutrients. The treatments included 5 levels of N addition of 0, 2, 4, 8, 16 times of initial soil, respectively, as control (CK), N1, N2, N3, and N4; P addition of the same gradients as CK, P1, P2, P3, and P4; we did three replicates for each treatment. The result showed a range of 14.63-14.63 mg/g for leaf N, 0.64-1.84 mg/g for P content and 10.04-23.21 for the N:P ratio of M. pauhoi seedlings. By N fertilization, a low–high–low pattern was observed in the leaf N content and N:P ratio, but an opposite pattern in the leaf P content; by P fertilization, the leaf P content first decreased then increased with the season. N or P fertilization significantly increased the leaf and soil N or P content respectively, and both significantly affected the soil pH (P < 0.05), the leaf N,P content and soil nutrient relationship. N addition improved the stoichiometric ratio, while P addition reduced it (P < 0.05). The results indicated that the N and P content in soil would affect the leaf N and P content of Machilus pauhoi seedings.

References

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Last Update: 2016-04-25