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| 秸秆还田对长期连作棉田土壤微生物量碳氮磷的影响 |
| Effects of Cotton Straw Incorporation on Soil Microbial Biomass Carbon, Nitrogen and Phosphorus in Long-Term Continuous Cropping Cotton Field |
| 投稿时间：2014-12-15 |
| DOI：10.13254/j.jare.2014.0354 |
| 中文关键词: 棉花 秸秆还田 长期连作 棉田 微生物量 |
| 英文关键词: cotton straw returning long-term continuous cropping cotton field microbial biomass |
| 基金项目:国家自然科学基金项目(31260307) |
| 作者 | 单位 | E-mail | | 郭成藏 | 新疆兵团绿洲生态农业重点实验室, 石河子大学, 新疆 石河子 832003 | | | 李鲁华 | 新疆兵团绿洲生态农业重点实验室, 石河子大学, 新疆 石河子 832003 | | | 黄金花 | 新疆兵团绿洲生态农业重点实验室, 石河子大学, 新疆 石河子 832003 | | | 刘军 | 新疆兵团绿洲生态农业重点实验室, 石河子大学, 新疆 石河子 832003 | | | 杨志兰 | 新疆兵团绿洲生态农业重点实验室, 石河子大学, 新疆 石河子 832003 | | | 魏飞 | 新疆兵团绿洲生态农业重点实验室, 石河子大学, 新疆 石河子 832003 | | | 刘建国 | 新疆兵团绿洲生态农业重点实验室, 石河子大学, 新疆 石河子 832003 | l-jianguo@126.com |
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| 中文摘要: |
| 通过棉花长期连作定点微区试验, 研究了秸秆还田条件下长期连作棉田土壤微生物量碳、氮、磷(SMBC、SMBN、SMBP)含量的变化规律, 为衡量和评价秸秆还田对长期连作棉田土壤质量和肥力的影响提供科学的理论依据。研究结果表明:秸秆还田可以显著提高不同土层SMBC、SMBN、SMBP含量, 且随着连作年限增加, SMBC、SMBN、SMBP含量逐渐升高;秸秆不还田条件下, 随着连作年限增加SMBC、SMBN、SMBP含量下降, 0~20 cm土层秸秆还田条件下连作5、10、15年SMBC比无秸秆还田条件下分别增加 20.8%、67.2%、70.4%, SMBN比无秸秆还田条件下分别增加22.2%、81.2%、85.4%, SMBP比无秸秆还田条件下分别增加22.3%、81.2%、85.3%;秸秆还田条件下, 0~20 cm土层连作30年棉田SMBC比连作5、10、15、20年和25年分别增加了116.6%、86.2%、101.6%、28.9%和7.99%;0~20 cm土层连作30年的SMBN含量比连作5、10、15、20年和25年的分别增加了114.1%、82.1%、99.65%、27.8%和7.15%;0~20 cm土层连作30年的SMBP含量比连作5、10、15、20年和25年的分别增加了65.7%、6.9%、34.2%、1.4%和2.22%。不同土层间微生物量差异表现为0~20 cm> 20~40 cm> 40~60 cm。秸秆还田可以显著提高连作棉田微生物量碳、氮、磷的含量, 且可以缓解棉花连作的不利影响, 有利于提高土壤质量和土壤肥力。 |
| 英文摘要: |
| This study explored the effect of straw incorporation on the content of soil microbial biomass carbon (SMBC), microbial biomass nitrogen (SMBN) and microbial biomass phosphorus(SMBP) in the continuous cropping cotton field. Results showed that cotton straw incorporation could increase the content of SMBC, SMBN and SMBP significantly in different soil layers. Besides, with the time of continuous cropping increasing, the content of SMBC, SMBN and SMBP were all remarkably raised in the straw incorporation treatment. However, with the time of continuous cropping increasing, the content of SMBC, SMBN and SMBP were all remarkably declined in the straw removal treatment. In 0~20 cm soil layer, compared with the straw removal, both SMBC content and SMBN content with 5, 10, 15 years continuous cropping treatments in the straw incorporation treatment were increased by 20.8%, 67.2%, 70.4% and 22.2%, 81.2%, 85.4%, respectively, and the SMBP content in the straw incorporation treatment was increased by 22.3%, 81.2%, 85.3%, respectively. Under the cotton straw incorporation, in 0~20 cm soil layer, compared with the 5, 10, 15, 20, 25 years continuous cropping, both SMBC content and SMBN content in 30 years were increased by 116.6%, 86.2%, 101.6%, 28.9%, 8.99% and 114.1%, 82.1%, 99.65%, 27.8%, 7.15%, respectively, and the SMBP content in 30 years was increased by 65.7%, 6.9%, 34.2%, 1.4%, 2.2%, respectively. The content of SMBC, SMBN, SMBP in different soil layers decreased in the order as 0~20 cm> 20~40 cm> 40~60 cm. Consequently, cotton straw incorporation could significantly increase the the content of soil microbial biomass carbon, microbial biomass nitrogen and microbial biomass phosphorus in the long-term continuous cropping cotton field, besides it could alleviate the negative impact of cotton continuous cropping, so that it would be beneficial to improve the soil quality and soil fertility. |
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