Crop Yield,N Uptake and Nitrates in a Fluvo-Aquic Soil Profile

作     者：ZHANGShu-Xiang LIXiu-Ying LIXiao-Ping YUANFeng-Ming YAOZhao-Hua SUNYong-Lin ZHANGFu-Dao ZHANG Shu-Xiang, LI Xiu-Ying, LI Xiao-Ping, YUAN Feng-Ming, YAO Zhao-Hua, SUN Yong-Lin and ZHANG Fu-DaoInstitute of Soils and Fertilizers, Chinese Academy of Agricultural Sciences, Beijing 100081 (China). E-mail: sxzhang@caas.ac.cn

作者机构：InstituteofSoilsandFertilizersChineseAcademyofAgriculturalSciencesBeijing100081（China） 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2004年第14卷第1期

页      面：131-136页

核心收录：

学科分类：090101[农学-作物栽培学与耕作学] 09[农学] 0901[农学-作物学] 

基　　金：Project supported by the Ministry of Agriculture  China (No. 95-17-03-01) 

主　　题：fertilizer combination N uptake nitrate distribution and accumulation yield 

摘      要：The effects of different chemical fertilizer combinations (N, P and K) oncrop yield, N uptake and nitrate distribution and accumulation to a depth of 100 cm were studied ina cinnamon fluvo-aquic soil profile (Beijing) with a continuous winter wheat-summer maize croppingsystem for nine years. The experiment consisted of 7 treatments: no fertilizer control (CK); Nalone, N in combination with K (NK), P (NP), and P and K (NPK and N1PK); and P and K in combinationwithout N (PK). The rate of N was 150 kg ha^(-1) for the N treatments except Treatment N1PK withhigher N rate (195 kg ha^(-1)), and the rates of P (P_2O_5) and K (K2O) were 75 and 37.5 kg ha^(-1),respectively. The applications of N combined with P and K (NK, NP and NPK) resulted in higher cropyields than a single application of N. The yields followed the order: NPK NP N1PK PK NK N CK for winter wheat, and NPK N1PK NP NK N PK CK for summer maize. Supplement of N withP or K, or both P and K resulted in a higher average N uptake of the two crops, which was in adecreasing order NPK NP N1PK NK N PK CK. The combinations also increased apparent Nrecovery more than N alone and CK. The nitrate content in the profile was thus reduced more in thecombination treatments. The nitrate accumulation in the soil profiles followed the order: N NK N1PK NPK NP CK PK. Higher N uptake by the adequately fertilized crops (Treatment NPK)reduced nitrate accumulation in the profile and thus reduced nitrate leaching. The optimum N:P:Kratio was thus of paramount importance in increasing yields and N uptake of crops and reducingnitrate leaching losses.