| 秸秆还田方式及施氮量对滴灌棉田土壤有机碳氮的影响 |
| |
| 引用本文： | 霍启煜,马丽娟,徐悦轩,闵伟,侯振安.秸秆还田方式及施氮量对滴灌棉田土壤有机碳氮的影响[J].水土保持学报,2022,36(3):207-212. |
| |
| 作者姓名： | 霍启煜 马丽娟 徐悦轩 闵伟 侯振安 |
| |
| 作者单位： | 石河子大学农学院, 新疆生产建设兵团绿洲生态农业重点实验室, 新疆 石河子 832003 |
| |
| 基金项目： | 国家重点研发计划项目(2017YFD0200100,2018YFD0800800) |
| |
| 摘 要： | 通过连续7年田间定位试验,采用2因素试验设计,设置秸秆不还田(CK)、秸秆直接还田(ST)和秸秆炭化还田(BC)3种秸秆还田方式和0(N0),300(N300),450(N450) kg/hm23个施氮(N)量,研究秸秆直接还田和炭化还田配施氮肥对土壤碳氮含量和棉花产量的影响。结果表明:ST和BC处理土壤有机碳含量呈现逐年递增趋势,且BC处理增幅大于ST处理。第7年,在各施氮水平下,ST处理较CK处理土壤有机碳提高33.28%~36.43%,BC处理较CK处理土壤有机碳提高58.56%~63.25%。多年秸秆还田(ST和BC)可以提高土壤全氮含量,N0水平下,ST处理全氮含量最高;N300水平下,BC处理7年后土壤全氮含量较ST处理显著提高;N450水平下,5年后BC处理土壤全氮含量高于ST处理。在N0水平,ST和BC处理提高了土壤碳/氮,N300和N450水平,BC处理提高了土壤碳/氮。秸秆炭化还田配施氮肥显著提高了棉花产量,N300和N450条件下,BC处理较CK增产17.43%~17.89%。因此,多年秸秆炭化还田配施氮肥可增加土壤有机碳含量,氮库容量和土壤碳/氮,提高棉花产量。
|
| 关 键 词： | 滴灌棉田 秸秆还田方式 施氮量 有机碳 全氮 |
| 收稿时间： | 2021/10/20 0:00:00 |
Effects of Straw Returning Mode and Nitrogen Application Rate on Soil Organic Carbon and Nitrogen in Drip Irrigated Cotton Field |
| |
| HUO Qiyu,MA Lijuan,XU Yuexuan,MIN Wei,HOU Zhenwei.Effects of Straw Returning Mode and Nitrogen Application Rate on Soil Organic Carbon and Nitrogen in Drip Irrigated Cotton Field[J].Journal of Soil and Water Conservation,2022,36(3):207-212. |
| |
| Authors: | HUO Qiyu MA Lijuan XU Yuexuan MIN Wei HOU Zhenwei |
| |
| Institution: | Agricultural College of Shihezi University, Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi, Xinjiang 832003 |
| |
| Abstract: | Effects of straw returning directly and carbonization returning combined with nitrogen fertilizer on the content of carbon and nitrogen in soil and cotton yield were evaluated through a field positioning experiment for seven consecutive years. Using a two-factor experimental design, three straw returning modes were set up, which were no straw returning (CK), straw returning directly (ST) and straw carbonization returning (BC). Three nitrogen application rates were set up as 0 (N0), 300 (N300) and 450 (N450) kg/hm2, respectively. The results showed that the content of soil organic carbon in ST and BC treatments increased year by year, and the increase of BC was greater than that of ST. In the 7th year, under different nitrogen application levels, the soil organic carbon of ST treatment was 33.28%~36.43% higher than that of CK, and that of BC treatment was 58.56%~63.25% higher than that of CK. Straw returning (ST and BC) for many years could improve the content of soil total nitrogen. Under N0 level, the highest of total nitrogen content was found in ST treatment. Under N300 level, the total nitrogen content of BC was significantly higher than that of ST after seven years. Under N450 level, the total nitrogen content of BC treatment was higher than that of ST after five years. Both ST and BC treatments increased soil C/N ratio under N0 level, while only BC treatment increased soil C/N ratio under N300 and N450 levels. Straw carbonization returning combined with nitrogen fertilizer application significantly increased cotton yield. Compared with CK, BC treatment increased cotton yield by 17.43%~17.89% under N300 and N450 levels. Therefore, straw carbonization returning combined with nitrogen fertilizer application could improve soil organic carbon content, nitrogen pool capacity and soil C/N ratio and cotton yield. |
| |
| Keywords: | drip irrigated cotton field straw returning mode nitrogen application rate organic carbon total nitrogen |
|
| 点击此处可从《水土保持学报》浏览原始摘要信息 |
| 点击此处可从《水土保持学报》下载免费的PDF全文 |
|
