文献类型：期刊文献

英文题名：Genetic variations and correlation analysis of N and P traits in Pinus massoniana under combined conditions of N deposition and P deficiency

作者：Hu, Chenyang[1,2,3] Zhao, Lei[1] Zhou, Zhichun[2] Dong, Guoqing[3] Zhang, Yi[1,2]

第一作者：Hu, Chenyang

通信作者：Zhang, Y[1];Zhang, Y[2]

机构：[1]Northwest Agr & Forestry Univ, Yangling 712100, Shanxi, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, 73 Daqiao Rd, Fu Yang, Zhejiang, Peoples R China;[3]Wuhan Polytech Univ, Wuhan 4300232, Hubei, Peoples R China

年份：2016

卷号：30

期号：4

起止页码：1341-1350

外文期刊名：TREES-STRUCTURE AND FUNCTION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000380132400025)】；

基金：This research was supported by the Start-up Project for Introduced Recruit in Northwest A&F University (Z111021402), the National Natural Science Foundation of China (31370671), and the National Key Technology R&D Program in the 12th Five year Plan of China (2012BAD01B02).

语种：英文

外文关键词：Nitrogen deposition; Phosphorus deficiency; Phosphorus efficiency; Nitrogen efficiency; N-P interactions; Masson pine (Pinus massoniana)

摘要：Significant genetic variations in N and P nutritional traits exist under combined conditions of soil P deficiency and N deposition and interactively contribute to growth benefits. Forest ecosystems encounter combined conditions of soil phosphorus (P) deficiency and atmospheric nitrogen (N) deposition. As such, determining genetic variations and interactions of N and P nutritional traits is important for silviculture. Low N (LN) and high N (HN) were combined with three P treatments in a pot experiment with five full-sib families of Masson pine (Pinus massoniana). The three P treatments are: low P in soil profile (low-P condition, LP), enriched P in topsoil and poor P in subsoil (medium-low-P condition, MLP), and high P in soil profile (high-P condition, HP). P acquisition was more significant for growth benefits than P utilization under LP. Growth response to N was higher under MLP and HP than that under LP because of more balanced plant N:P ratios in the two former conditions. Under HN, there were significant correlation between nitrogen acquisition efficiency (NAE) and phosphorus use efficiency (PUE) and they interactively contributed to growth promotion under N deposition. Significant genetic variations, as well as large heritability of growth and N and P nutritional traits, were detected under all N-P conditions. This finding indicated the feasibility of breeding families with improved nutrient efficiency under N-P conditions.