摘要
【目的】研究碱化土壤改良后土壤理化性质的变化对种植乔木红柳后树木生长进行对比,从而筛选出最优的改良剂配比。【方法】采用小区试验,以燃煤烟气脱硫废弃物和糠醛渣为碱化土壤的改良剂,设置不同改良剂配比组合,研究了碱化土壤改良后种植乔木红柳的效果。试验共设3个处理:T1处理(燃煤烟气脱硫废弃物(3.0 kg/坑)+糠醛渣(1.0 kg/坑)),T2处理(燃煤烟气脱硫废弃物(2.0 kg/坑)+糠醛渣(2.0 kg/坑))和T3处理(燃煤烟气脱硫废弃物(1.0 kg/坑)+糠醛渣(3.0 kg/坑))。【结果】随着种植年限的延长,不同处理下土壤的pH值、全盐量和碱化度(ESP)均有不同程度的降低。其中,T3处理对土壤的pH值、全盐量影响较大,种植第2年0~40 cm土层的pH值、全盐量分别从8.52和3.08‰降低到7.85和1.56‰;而T1处理对土壤的ESP影响最为显著,0~40 cm和40~80 cm土壤ESP降幅最大达到30.42%和22.75%。T1处理最有利于乔木红柳的生长,其成活率和保存率分别达到了91.66%和83.33%,较CK提高了37.48%和66.66%;而胸径和1 a生枝条长度分别为2.86 cm和20.8 cm,较CK提高了34.91%和30.00%。【结论】燃煤烟气脱硫废弃物和糠醛渣配合施用能有效降低碱化土壤的pH值、全盐量和ESP,从而有利于乔木红柳的生长和发育,其中T1处理为改良剂最优配比组合。
【Objective】Study the character changes of alkalized soil after improvement and make a comparison of the trees growth before and after planting Tamarisk trees and choose a potimal combination of amendment.【Method】The by-product of flue gas desulphurization（BFGD） and furfural residue were taken as the alkalized soil amendments,and different amendments combination for treatments,a field plot experiment was conducted to study the soil improvement effect and Tamarisk trees growth status.The three treatment were as follows：T1（BFGD 3.0 kg/pit＋ furfural residue 1.0 kg/pit）,T2（BFGD 2.0 kg/pit ＋ furfural residue 2.0 kg/pit） and T3（BFGD 1.0 kg/pit ＋ furfural residue 3.0 kg/pit）.【Result】The result showed that,with the extension of planting years,the pH,total salt and alkalinity（ESP） of the alkaline soil under different treatments were decreased to different degrees.T3 treatment had a greater impact on the soil pH and total salt,the pH of 0~40 cm soil layer decreased from 8.52 to 7.85,and the total salt decreased from 3.08‰ to 1.56‰ after planting 2 years.T1 treatment had the most significant effect on the soil ESP,the ESP of 0~40 cm and 40~80 cm soil maximum reduction reached to 30.42% and22.75%.By analyzing the growth index of Tamarisk trees,T1 treatment was the most conducive to the growth of Tamarisk trees,the survival rate and preservation rate were 91.66% and 83.33% respectively,which were 37.48%and 66.66% higher than that of the control; The diameter at breast height and annual branches were 2.86 cm and20.8 cm,which were 34.91% and 30.00% higher than that of the control.【Conclusion】The combination of BFGD and furfural residue can effectively reduce the soil pH,total salt content and ESP,which is beneficial to the growth and development of Tamarisk trees,and T1 treatment is the best combination of amendment.
作者
李茜
刘松涛
李明
何俊
孙兆军
LI Qian;LIU Songtao;LIMing;HE Jun;SUN Zhaojun(Institute of Enviromental Engineering, Ningxia University, Yinchuan 750021, China;Ningxia（China-Arab） Key Laboratory of Resource Assessment and Environment Regulation in Arid Region, Yinchuan 750021, China;Ningxia Polytechnic, Yinchuan 750021, China)
出处
《灌溉排水学报》
CSCD
北大核心
2018年第1期49-53,共5页
Journal of Irrigation and Drainage
基金
国家林业公益性行业科研专项(201504402)
宁夏高等学校科学研究项目(NGY2016079)
关键词
碱化土壤
改良
乔木红柳
alkaline soil
improved
Tamarisk trees
