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长期不同秸秆还田方式对褐土磷素组分的影响 被引量:2

Effects of Long-term Different Straw Returning on Phosphorus Components of Cinnamon Soil
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摘要 为了提高我国北方旱作地区秸秆和磷素的利用效率,试验选用秸秆不还田、秸秆覆盖还田、秸秆直接还田、秸秆过腹还田4个处理,供试土壤取自各处理1992—2016年0~20,20~40 cm土层,分析秸秆还田方式对褐土磷素组分时空分异特征的影响。结果表明,随着不同秸秆还田试验的进行,不同形态磷素均表现为前期变化较小,后期变化幅度增加;空间上在表层富集,差异性较大;不同活性磷占总磷比例表现为活性磷有所增加、中活性磷较平稳、稳定性磷有所降低;长期秸秆还田下活性磷中无机磷所占比例大幅度增加,秸秆过腹还田处理效果最好。秸秆还田能够促进磷素向有效态转化,明显提高活性态磷中无机磷所占比例,提高磷素的利用效率,且秸秆过腹还田效果最显著,其是一种值得推荐的秸秆还田方式。 To improve the effective utilization rate of straw and phosphorus in the dryland area of north China,the paper selected four treatments:no straw returning(CK),straw mulching(SM),straw crushing(SC)and cattle manure(CM).The tested soil was from 0-20,20-40 cm in 1992-2016 of each treatment,and analyzing the temporal and spatial variability characteristics under different straw returning methods.The results showed that with the development of different straw returning experiments,the changes of different phosphorus forms were small in the early stage and large in the later stage.In terms of spatial distribution,phosphorus contents were enriched in the surface layer,and showing a great difference.The proportion of the different active phosphorus in total phosphorus showed that the proportion of active phosphorus increased,the medium active phosphorus was relatively stable,and the stable phosphorus decreased.Under long-term straw returning condition,the proportion of inorganic phosphorus in active phosphorus increased significantly,and cattle manure treatment had the best effect.Straw returning can promote the conversion of phosphorus into active components,which can significantly improve the proportion of inorganic phosphorus in active phosphorus and improve the utilization efficiency of phosphorus.The effect is the most significant,which is a kind of recommended straw returning method.
作者 杜艳玲 周怀平 杨振兴 解文艳 程曼 郭晋 吕倩倩 王志伟 DU Yanling;ZHOU Huaiping;YANG Zhenxing;XIE Wenyan;CHENG Man;GUO Jin;LYU Qianqian;WANG Zhiwei(College of Bio-engineering,Shanxi University,Taiyuan 030006,China;Institute of Agricultural Environment and Resources,Shanxi Academy of Agricultural Sciences,Taiyuan 030031,China;Shanxi Climate Center,Taiyuan 030002,China)
出处 《山西农业科学》 2019年第11期1947-1954,1959共9页 Journal of Shanxi Agricultural Sciences
基金 山西省重点研发计划重点项目(201703D211002-3,201603D2110-5) 山西省重点研发计划一般项目(201703D221008-1) 公益性行业(气象)科研专项(GYHY201306038)。
关键词 褐土 长期秸秆还田 磷素组分 变化特征 有效性 cinnamon soil long-term straw returning phosphorus components change characteristics availability
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