Nutrient coordination mechanism of tiger nut induced by rhizosphere soil nutrient variation in an arid area, China

作     者：TAN Jin WU Xiuqin LI Yaning SHI Jieyu LI Xu TAN Jin;WU Xiuqin;LI Yaning;SHI Jieyu;LI Xu

作者机构：School of Soil and Water ConservationBeijing Forestry UniversityBeijing 100083China 

出 版 物：《干旱区科学:英文版》 (Journal of Arid Land)

年 卷 期：2023年第15卷第10期

页      面：1216-1230页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the National Key Research and Development Program of China(2019YFC0507600 2019YFC0507601) 

主　　题：tiger nut stoichiometry rhizosphere soil nitrogen addition marginal land 

摘      要：Tiger nut is a bioenergy crop planted in arid areas of northern China to supply oil and adjust the planting ***,in the western region of Inner Mongolia Autonomous Region,China,less water resources have resulted in a scarcity of available farmland,which has posed a huge obstacle to planting tiger *** of tiger nut on marginal land can effectively solve this *** fully unlock the production potential of tiger nut on marginal land,it is crucial for managers to have comprehensive information on the adaptive mechanism and nutrient requirement of tiger nut in different growth *** study aims to explore these key information from the perspective of nutrient coordination strategy of tiger nut in different growth periods and their relationship with rhizosphere soil *** fertilization treatments including no fertilization(N:P(nitrogen:phosphorous)=0:0),traditional fertilization(N:P=15:15),and additional N fertilizer(N:P=60:15)were implemented on marginal land in the Dengkou *** and soil samples were collected in three growth periods,including stolon tillering period,tuber expanding period,and tuber mature *** no fertilization,there was a significant correlation between N and P contents of tiger nut roots and tubers and the same nutrients in the rhizosphere soil(P0.05).Carbon(C),N,and P contents of roots were significantly higher than those of leaves(P0.05),and the C:N ratio of all organs was higher than those under other treatments before tuber maturity(P0.05).Under traditional fertilization,there was a significant impact on the P content of tiger nut tubers(P0.05).Under additional N fertilizer,the accumulation rate of N and P was faster in stolons than in tubers(P0.05)with lower N:P ratio in stolons during the tuber expansion period(P0.05),but higher N:P ratio in tubers(P0.05).The limited availability of nutrients in the rhizosphere soil prompts tiger nut to increase the C:N ratio,improving N utilizat