[ "霍启煜(1993-),男,硕士研究生,主要从事土壤肥力与调控研究。E-mail:15735801074@163.com" ]
网络首发:2022-05-27,
纸质出版:2022
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霍启煜, 马丽娟, 徐悦轩, 等. 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.
HUO Qiyu, MA Lijuan, XU Yuexuan, et al. Effects of Straw Returning Mode and Nitrogen Application Rate on Soil Organic Carbon and Nitrogen in Drip Irrigated Cotton Field[J]. 2022, 36(3): 207-212.
霍启煜, 马丽娟, 徐悦轩, 等. 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. DOI: 10.13870/j.cnki.stbcxb.2022.03.030.
HUO Qiyu, MA Lijuan, XU Yuexuan, et al. Effects of Straw Returning Mode and Nitrogen Application Rate on Soil Organic Carbon and Nitrogen in Drip Irrigated Cotton Field[J]. 2022, 36(3): 207-212. DOI: 10.13870/j.cnki.stbcxb.2022.03.030.
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。
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.
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