文献类型：期刊文献

英文题名：Localized and Moderate Phosphorus Application Improves Plant Growth and Phosphorus Accumulation in Rosa multiflora Thunb. ex Murr. via Efficient Root System Development

作者：Ma, Qinghua[1] Chen, Lin[1] Du, Manyi[1] Zhang, Yongan[1] Zhang, Yaoxiang[1]

通信作者：Ma, QH[1]

机构：[1]Chinese Acad Forestry, Expt Ctr Forestry North China, Beijing 102300, Peoples R China

年份：2020

卷号：11

期号：5

外文期刊名：FORESTS

收录：;EI(收录号：20202508848147);Scopus(收录号：2-s2.0-85086500671);WOS:【SCI-EXPANDED(收录号:WOS:000542736000085)】；

基金：This research was funded by the Chinese National Natural Science Foundation (31700559) and the Science Foundation of the Chinese Academy of Forestry (CAFYBB2017MA017, CAFYBB2017ZC006).

语种：英文

外文关键词：phosphorus; heterogeneous; moderate; nutrient uptake; efficient root systems

摘要：Roots have high plasticity with the ability to adapt to heterogeneous nutrient distribution, but little is known about the effects of phosphorus (P) supply methods and levels onRosa multifloraThunb. ex Murr. root growth and nutrient accumulation. A pot study was conducted with two P supply methods (mixed and localized application) and three levels (P-deficient, P-moderate and P-adequate). The results showed that with localized application, P-deficient and P-moderate treatments significantly improved total root length, total surface area, total length of fine roots, shoot DW and total P accumulation inRosa multifloracompared with their respective mixed application at 45 days after being transplanted (DAT) and 92 DAT; for P-adequate supply, the same trends were observed at 45 DAT, but not at 92 DAT. At 92 DAT, with localized application, when P levels increased from P-deficient to P-moderate, total P accumulation increased by 43.3%; but when P levels increased from P-moderate to P-adequate, no effect was observed. Furthermore, higher P accumulation in leaves was observed in localized P-moderate condition; decreased P uptake per root dry weight and greater root/shoot ratio were observed in localized P-adequate at 92 DAT. Total P accumulation was positively correlated with total root length and root surface area (R-2: 0.68 similar to 0.94). There was a significant interaction effect among treatment days, P supply methods and levels (p <= 0.05) on shoot DW, root DW, root/shoot ratio and total P accumulation. These findings indicated that localized and moderate P supply appear efficient for improvingR. multifloragrowth and P accumulation via efficient root system development.