摘要
为内蒙古平原灌区春玉米连续高产稳产过程中秸秆培肥高产田和改良盐碱田提供理论依据。设置了玉米秸秆还田1~4 a(HT1~HT4)定位试验,以秸秆不还田作为对照(CK),测定了春播前和收获期土壤有机碳含量、全氮含量、有效氮含量、有效磷含量、阳离子交换量、pH值和酸碱缓冲曲线。结果表明,HT1~HT4收获期与春播前相比土壤有机碳含量、全氮含量、有效氮含量、有效磷含量、阳离子交换量的相对变化率为1.34%~3.62%,0.20%~1.51%,-0.11%~0.78%,0.89%~6.36%,0.09%~0.41%,CK收获期与春播前相比土壤有机碳含量、全氮含量、有效氮含量、有效磷含量、阳离子交换量的相对变化率为1.57%,-0.02%,-0.45%,-0.15%,-0.05%;HT2、HT3、HT4比CK的土壤pH值显著降低;土壤对碱的缓冲能力依次为HT4>HT3>HT2>HT1>CK。综上所述,随秸秆还田年限的增加,土壤固碳能力、保肥能力和缓冲性能增大,有效抵御因施化肥等因素导致土壤pH值剧烈变化的能力增强,秸秆还田培肥改土措施显著提升了土壤质量。
In order to provide theoretical basis for straw fertilizing high-yield field and improving saline-alkali field in the process of continuous high yield and stable yield of spring corn in Inner Mongolia plain irrigation area.This study set up a positioning test of corn straw returning to the field for 1 to 4 years(HT1—HT4),taking the straw not returning to the field as the control(CK).Soil organic carbon content,total nitrogen content,available nitrogen content,available phosphorus content,cation exchange capacity,pH value and acid-base buffer curve were measured before spring sowing and during harvest.The results showed that,the relative change rates of soil organic carbon content,total nitrogen content,available nitrogen content,available phosphorus content and cation exchange capacity were 1.34%—3.62%,0.20%—1.51%,-0.11%—0.78%,0.89%—6.36%and 0.09%—0.41%during harvest period of HT1—HT4 compared with that before spring sowing.The relative change rates of soil organic carbon content,total nitrogen content,available nitrogen content,available phosphorus content and cation exchange capacity were 1.57%,-0.02%,-0.45%,-0.15%and-0.05%in CK harvest period compared with that before spring sowing.Soil pH value of HT2,HT3 and HT4 was significantly lower than that of CK.The buffer capacity of soil to alkali was HT4>HT3>HT2>HT1>CK.In summary,with the increase of straw returning years,soil carbon sequestration capacity,fertilizer retention capacity and buffering performance increase,and the ability to effectively resist drastic changes in soil pH value caused by fertilizer application and other factors was enhanced,soil quality was significantly improved by straw returning to field for fertilizer cultivation and soil improvement measures.
作者
于博
刘雅梦
杨哲
王佳乐
王钰艳
郭艳
马扬
任琴
穆俊祥
YU Bo;LIU Yameng;YANG Zhe;WANG Jiale;WANG Yuyan;GUO Yan;MA Yang;REN Qin;MU Junxiang(School of Life Science and Technology,Jining Normal University,Jining 012000,China;Key Laboratory of Stress Resistance of Biological Cash Crops in Ulanqab,Jining 012000,China;Jining Normal University,Jining 012000,China;Jining District Agriculture,Animal Husbandry and Water Conservancy Development Center,Jining 012000,China)
出处
《华北农学报》
CSCD
北大核心
2024年第1期120-126,共7页
Acta Agriculturae Boreali-Sinica
基金
乌兰察布市基础研究项目(2021JC201)
内蒙古自治区自然科学基金项目(2021BS03022)
集宁师范学院博士创新科研基金项目(jsbsjj2305)
集宁师范学院博士科研启动基金项目(jsbsjj1710)
集宁师范学院生物技术研发与应用研究所项目
大学生创新创业训练计划项目(202211427002,S202211427023,X20231142070034,X20231142070044)
内蒙古自治区哲学社会学重点研究基地项目。
关键词
秸秆还田
土壤有机碳
土壤养分吸附
土壤阳离子交换量
土壤酸碱缓冲曲线
盐碱田
Straw returning
Soil organic carbon
Soil nutrient adsorption
Soil cation exchange capacity
Soil acid-base buffer curve
Saline-alkali field
