摘要
龟裂碱土是一种碱化度高、结构极差的碱化土壤,在中国西北地区有大面积的分布。探索综合施用脱硫石膏对碱化土壤结构的影响对阐释改良机理,建立优化的改良方法具有重要意义。该研究通过在河套灌区进行的多年期碱化土壤改良田间试验,分析了不同改良剂处理下土壤理化性质和作物产量的变化,评价了脱硫石膏与结构改良剂配合施用对盐碱土壤的改良效果。结果表明:脱硫石膏与结构改良剂的配合施用显著提高了土壤有机碳、全氮、总孔隙度和大粒级团聚体含量,一定程度上降低了pH、全盐和容重,从而促进了枸杞(Lycium chinense)生长发育、提高了枸杞产量,且其改良效果随结构改良剂施用量增加而增加。在实际推广应用中,依据当地土壤盐碱程度,并综合考虑了枸杞种植过程中的产投比,初步确定T3处理(300kg·hm-2结构改良剂)为最佳的结构改良剂施用量,但其应用效果有待进一步的试验验证。研究结果为控制河套灌区土壤盐碱化进程、实现盐碱土资源可持续利用提供了科学指导。
Takyric solonetz is a kind of alkali soil with a high sodicity and poor structure,widely spreaded in northwest China.Using desulfurized gypsum as a kind of soil amendment on takyric solonetz to develop soil quality is of great importance to elucidate the mechanism of alkali soil recalmation.This study was based on a field experiment lied in Hetao irrigation district in Ningxia,China.The property of soil physics,soil chemistry under different treatments and Lyciumchinense charactersitics including survival rate,individual height and yield were investigated to study the effects of adding structure krilium combined with desulfurized gypsum on alkali soil.The results showed that,the addition of desulfurized gypsum and structure krilium greatly increased soil organic carbon,total N,soil porosity and the content of soil water stable aggregate,respectively,while they decreased pH,total salt and volume weight at certain extents respectively.Therefore,the survival rate,individual height and yield of L.chinense were increased,and the improved effect increased with the amount of use increase.According to the degree of the local saline-alkali land and the cost benefit analysis of the L.chinense production process,the addition of T3（300 kg·hm^-2 krilium）was the optimum dosage in practical application.However,further experiment should be conducted to test application effect.The results provided scientific guidance for controlling the process of soil salinization in Hetao irrigation district and realizing the sustainable use of saline alkali soil.
作者
杜雅仙
马凯博
康扬眉
余海龙
黄菊莹
张俊华
DU Yaxian;MA Kaibo;KANG Yangmei;YU Hailong;HUANG Juying;ZHANG Junhua(College of Recourses and Environment,Ningxia University,Yinchuan,Ningxia 750021;Institute of Environmental Engineering,Ningxia University,Yinchuan,Ningxia 750021)
出处
《北方园艺》
CAS
北大核心
2018年第21期129-135,共7页
Northern Horticulture
基金
国家自然科学基金资助项目(41561060
41261068)
关键词
龟裂碱土
改良剂
枸杞
土壤结构
河套灌区
takyric solonetz soil
krilium
Lycium chinense
soil properties
Hetao irrigation district
