土壤化学特征对草田轮作组合的响应  

Response of Soil Chemical Characteristics to Grass-crop Rotation Combinations

作　　者：秦乐 温超 张璞进 刘思博 郭月峰 许嘉逸 张英 殷国梅 QIN Le;WEN Chao;ZHANG Pujin;LIU Sibo;GUO Yuefeng;XU Jiayi;ZHANG Ying;YIN Guomei(College of Desert Control Science and Engineering,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia010018;Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot,Inner Mongolia010031)

机构地区：[1]内蒙古农业大学沙漠治理学院,内蒙古呼和浩特010018 [2]内蒙古自治区农牧业科学院,内蒙古呼和浩特010031

出　　处：《畜牧与饲料科学》2024年第6期64-74,共11页Animal Husbandry and Feed Science

基　　金：国家牧草产业技术体系(CARS-34-38);内蒙古饲草现代农牧业产业技术体系;国家重点研发计划项目(2022YFD1601201)。

摘　　要：[目的]探究土壤化学特征对不同草田轮作组合的响应。[方法]结合研究区作物种植习惯,选取3种经济作物(玉米、向日葵、马铃薯)和3种饲草作物(苜蓿、谷草、高丹草)为研究对象,设置5个轮作组合(T1:苜蓿-向日葵-向日葵-马铃薯-玉米;T2:谷草-马铃薯-谷草-谷草-向日葵;T3:苜蓿-苜蓿-马铃薯-玉米-向日葵;T4:高丹草-马铃薯-玉米-向日葵-玉米;T5:马铃薯-谷草-向日葵-马铃薯-谷草),在内蒙古自治区包头市达尔罕茂明安联合旗开展种植试验,在5年的种植周期内比较分析不同轮作组合下0~10、10~20、20~30 cm土层土壤主要化学特征的差异。[结果]在0~10 cm土层,T4组合的全氮、速效钾、无机碳、全硫含量显著(P<0.05)高于其他组合;T3组合的有机碳含量最高,显著(P<0.05)高于T2、T4、T5组合;T3组合的碳磷比显著(P<0.05)高于其他组合。在10~20 cm土层,T4组合的全氮、速效钾、全硫含量显著(P<0.05)高于其他组合;T3组合的有机碳含量、碳氮比、碳磷比显著(P<0.05)高于其他组合。在20~30 cm土层,T4组合的速效钾、全硫含量显著(P<0.05)高于其他组合;T3组合的无机碳含量最高,显著(P<0.05)高于T2组合;T3组合的碳磷比最高,显著(P<0.05)高于T1、T2、T5组合。[结论]综合不同轮作组合对土壤养分含量的提升以及作物对土壤养分的吸收利用效率,推荐该区域采用苜蓿-苜蓿-马铃薯-玉米-向日葵(T3组合)作为最优的草田轮作组合。研究结果可为优化该区域草田轮作制度、提高土壤可持续利用能力提供参考。[Objective]To investigate the response of soil chemical characteristics to various grass-crop rotation combinations.[Methods]In accordance with the crop planting practices in the study area,six crops were selected as research subjects:three economic crops(corn,sunflower,and potato)and three forage crops(alfalfa,millet straw,and sorghum-sudan grass).Five rotation combinations were established as follows:T1(alfalfa-sunflower-sunflower-potato-corn);T2(millet straw-potato-millet straw-millet straw-sunflower);T3(alfalfa-alfalfa-potato-corn-sunflower);T4(sorghum-sudan grass-potato-corn-sunflower-corn);and T5(potato-millet straw-sunflower-potato-millet straw).Field experiments were conducted over a five-year period in Darhan Muminggan United Banner,Baotou City,Inner Mongolia Autonomous Region.The primary chemical properties of soil at depths of 0-10 cm,10-20 cm,and 20-30 cm were compared and analyzed under different rotation regimes.[Results]In the 0-10 cm soil layer,the T4 combination exhibited significantly higher(P<0.05)levels of total nitrogen,available potassium,inorganic carbon,and total sulfur compared to other combinations.The organic carbon content was highest in the T3 combination and significantly higher(P<0.05)than in the T2,T4,and T5 combinations.Additionally,the carbon-to-phosphorus ratio in the T3 combination was significantly higher(P<0.05)than in other combinations.In the 10-20 cm soil layer,the T4 combination showed significantly higher(P<0.05)levels of total nitrogen,available potassium,and total sulfur relative to other combinations.The T3 combination had significantly higher(P<0.05)levels of organic carbon,carbon-to-nitrogen ratio,and carbon-to-phosphorus ratio compared to other combinations.In the 20-30 cm soil layer,the T4 combination demonstrated significantly higher(P<0.05)levels of available potassium and total sulfur compared to other combinations.The inorganic carbon content was highest in the T3 combination and significantly higher(P<0.05)than in the T2 combination.Furthermore,the carbon-to-

关 键 词：草田轮作 轮作组合 土壤养分 化学特征 

分 类 号：S344.16[农业科学—作物栽培与耕作技术] S812.2[农业科学—农艺学]