首页 | 本学科首页   官方微博 | 高级检索  
     检索      

磷石膏改良强酸性黄壤的效应研究
引用本文:肖厚军,王正银,何佳芳,苟久兰.磷石膏改良强酸性黄壤的效应研究[J].水土保持学报,2008,22(6).
作者姓名:肖厚军  王正银  何佳芳  苟久兰
作者单位:1. 西南大学,资源环境学院,重庆,400716;贵州省土壤肥料研究所,贵州,贵阳,550006
2. 西南大学,资源环境学院,重庆,400716
3. 贵州省土壤肥料研究所,贵州,贵阳,550006
基金项目:贵州省农业科技攻关项目,贵州省农业科学院专项资金项目
摘    要:采用盆栽试验,以耐铝能力弱的高粱和强酸性黄壤为研究对象,探讨了磷石膏对强酸性环境高粱生长、养分平衡以及对土壤有效养分和交换铝的影响。结果表明,在强酸性黄壤上,由于铝毒作用,即使施足氮磷钾肥,高粱也生长不良;施用磷石膏和石灰的高粱生长正常,各生物学性状均极显著优于对照,施磷石膏高粱长势更优于施石灰者,高粱干重与磷石膏、石灰的施用量呈二次曲线变化(回归方程分别为:y=6.88 11.92x-1.65x2,R=0.983;y=6.88 6.39x-0.72x2,R=0.996),高粱株高和根长与磷石膏、石灰的施用量也呈二次曲线变化;磷石膏降低酸性黄壤铝毒、提高植物钙含量的效果略逊于石灰,在提高植物营养三要素(特别是磷、钾元素)的作用方面优于石灰,施磷石膏高粱磷、钾含量较石灰处理分别提高117.0%~200.0%和13.0%~14.8%;施磷石膏生长良好的高粱植株氮/磷、氮/钾、钾/磷比分别为6.8~7.1,1.2~1.3和5.4~5.6,比值适中、变幅小,氮/铝、磷/铝、钾/铝、钙/铝比分别是对照植株的1.9~2.0倍,5.8~6.3倍,1.8~2.1倍和2.0~2.5倍,改善和调节了高粱体内氮、磷、钾、钙养分的平衡;施磷石膏的土壤有效氮、磷、钾、钙较对照极显著增加,土壤有效磷、钾分别比施石灰提高41.8%~114.2%和59.4%~67.5%,施石灰的土壤有效磷、钾与对照差异不显著。

关 键 词:磷石膏  强酸性黄壤  交换铝  养分平衡

Effects of Phosphogypsum on Nutrient Balance of Broomcorn Grown in Strongly Acidic Yellow Soil
XIAO Hou-jun,WANG Zheng-yin,HE Jia-fang,Gou Jiu-lan.Effects of Phosphogypsum on Nutrient Balance of Broomcorn Grown in Strongly Acidic Yellow Soil[J].Journal of Soil and Water Conservation,2008,22(6).
Authors:XIAO Hou-jun  WANG Zheng-yin  HE Jia-fang  Gou Jiu-lan
Institution:XIAO Hou-jun1,2,WANG Zheng-yin1,HE Jia-fang2,Gou Jiu-lan2
Abstract:To proble into effects of phosphogypsum on growth and nutrient balance of broomcorn and soil available nutrient in strongly acidic soil,pot cultivated trials were conducted to investigate why phosphogypsum was better than lime in amelioring acidic yellow soil.Results showed that even if sufficient nutrient was supplied broomcorn grown in strongly acid yellow soi1 were severly affected by A1 toxicity broomcorn seedlings had not grown well after germination without application of phosphogypsum or lime.However,plant growth was improved by application of phosphogypsum(x1) or lime(x2)which could increase soil pH decrease the concentration of exchangable A1 in strongly acidic soil.The regresstion equations were below: y=6.88 11.92x-1.65x2,R=0.983;y=6.88 6.39x-0.72x2,R=0.996.Lime was superior to phosphogypsumin alleviating A1 toxicity and raising contents of calcium,and was inferior to phosphogypsum in increasing available nitrogen,phosphorus,potassium in broomcorn plant.The content of phosphorus in plant by application of phosphogypsum was more 117.0%~200.0% than that by application of lime.Compared to application of lime,application of phosphogypsum could increase contents of nitrogen,phosphorus,potassium and calcium,and sustain moderate N/P,N/K and K/P and improve balance of nitrogen,phosphorus,potassium and calcium in broomcorn plant.Moreover,phosphogypsum was also superior to lime in increasing available nitrogen,phosphorus,potassium,calcium in strongly acidic soil.
Keywords:phosphogypsum  strongly acidic yellow soil  exchangable aluminium  nutrient balance
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《水土保持学报》浏览原始摘要信息
点击此处可从《水土保持学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号