应用生态学报2018，Vol.29Issue(2)：592-598,7.DOI:10.13287/j.1001-9332.201802.027
干旱绿洲灌区大白菜施磷效应与磷肥投入阈值
Phosphorus application effects and input threshold of Chinese cabbage in the oasis irrigation region
摘要
Abstract
To resolve the problem of higher application and lower use efficiency of phosphorus fertilizer of Chinese cabbage (Brassica pekinensis),the yield,use efficiency of phosphate fertilizer and soil phosphate balance were examined by a located field trial in Zhangye Observation and Experiment Station of the Agro-ecological Environment in oasis irrigation region from 2011 to 2013.The results showed that the yield increased with the increase of phosphorus fertilization rate from 0 to 112.52 kg P · hm-2,beyond which there would be no further enhancement.The yield was 5489.1 kg · hm-2 at 112.52 kg P · hm-2 treatment.This treatment increased the yield by 13.3％-23.8％,under which the phosphorus use efficiency was 14.2％.Soil Olsen-P and CaCl2-P were positively correlated.For 111.1 kg P · hm-2 treatment,the content of soil Olsen-P was 24.22 mg · kg-1,with no phosphorus leaching and no pollution.At the rate of 60.17 kg P · hm-2,there was a balance between phosphorus input and output and the phosphate demand of Chinese cabbage being met.In conclusion,the optimal phosphorus threshold was 60.17-112.52 kg · hm-2 for Chinese cabbage,the amount at which could reduce the risk of phosphorus pollution.关键词
磷肥阈值/磷平衡/磷肥利用率/大白菜/干旱绿洲灌区Key words
phosphorus threshold/phosphorus balance/phosphorus use efficiency/Chinese cabbage/oasis irrigation region引用本文复制引用
连彩云,马忠明..干旱绿洲灌区大白菜施磷效应与磷肥投入阈值[J].应用生态学报,2018,29(2):592-598,7.基金项目
本文由农业部公益性行业(农业)科研专项(201003014-7)和甘肃省农业科学院学科团队项目(2017GAAS25)资助 This work was supported by the Agro-scientific Research Programs in Public Interest (201003014-7)and the Academic Team in Gansu Academy of Agricultural Sciences(2017GAAS25). （农业）
