Effects of supplying silicon nutrient on utilization rate of nitrogen and phosphorus nutrients by rice and its soil ecological mechanism in a hybrid rice double-cropping system

作     者：Min LIAO Zhi-ping FANG Yu-qi LIANG Xiao-hui HUANG Xu YANG Shu-sen CHEN Xiao-mei XIE Chang-xu XU Jia-wen GUO Min LIAO;Zhi-ping FANG;Yu-qi LIANG;Xiao-hui HUANG;Xu YANG;Shu-sen CHEN;Xiao-mei XIE;Chang-xu XU;Jia-wen GUO

作者机构：College of Environmental and Resource ScienceZhejiang UniversityHangzhou 310058China Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant NutritionHangzhou 310058China Experimental Teaching CenterCollege of Environment and ResourcesZhejiang UniversityHangzhou 310058China Institute of Soil&Fertilizer and Resource&EnvironmentJiangxi Academy of Agricultural SciencesNanchang 330200China 

基　　金：Project supported by the National Key Research and Development Project of China(No.2016YFD0200800) the National Natural Science foundation of China(No.41571226) 

出 版 物：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 (浙江大学学报（英文版）B辑（生物医学与生物技术）)

年 卷 期：2020年第21卷第6期

页      码：474-484页

摘      要：This study was conducted to reveal the effects of silicon(Si) application on nutrient utilization efficiency by rice and on soil nutrient availability and soil microorganisms in a hybrid rice double-cropping planting system. A series of field experiments were conducted during 2017 and 2018. The results showed that Si nutrient supply improved grain yield and the utilization rates of nitrogen(N) and phosphorus(P) to an appropriate level for both early and late plantings, reaching a maximum at 23.4 kg/ha Si. The same trends were found for the ratios of available N(AN) to total N(TN) and available P(AP) to total P(TP), the soil microbial biomass carbon(MBC), microbial biomass nitrogen(MBN), microbial biomass phosphorus(MBP), and the ratios of MBN to TN and MBP to TP, at different levels of Si. Statistical analysis further revealed that Si application enhanced rice growth and increased the utilization rate of fertilizer due to an ecological mechanism, i.e., Si supply significantly increased the total amount of soil microorganisms in paddy soil compared to the control. This promoted the mineralization of soil nutrients and improved the availability and reserves of easily mineralized organic nutrients.

主 题 词：Silicon nutrient Utilization rate of fertilizer Ecological mechanism Rice double-cropping system 

学科分类：09[农学] 0903[农学-动物生产类] 090301[090301] 

核心收录：

D　O　I：10.1631/jzus.B1900516

馆 藏 号：203922847...