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| Effect of Four Fumigants on Soil Nitrification and Related Enzyme Activity |
| MA Tao-tao1，2，YAN Dong-dong1，2，MAO Lian-gang1，2 ，WANG Qiu-xia1，2，LI Yuan 1，2，OU YANG Can-bin1，2，GUO Mei-xia1，2，CAO Ao-cheng1，2，3* |
| （1Institute of Plant Protection，Chinese Academy of Agricultural Sciences，Beijing 100193，China；2Key Laboratory of Pesticide Chemistry and Application Technology，Ministry of Agriculture，Beijing 100193，China；3Team-Innovation of Beijing Modern Agriculture and Industrial Technology Innovation System，Beijing 100029，China） |
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Abstract Taking soil which cucumber， tomato rotation for more than 3 years in Shunyj Djstrict of Beijing vegetable greenhouses as research object，and adopting the method of indoor constant temperature with aerated condition，this paper studied the effects of 4 fumigants Chloropicrin（Pic），1，3-Dichloropropene（1，3-D），methyl disulfide（DMDS）and methamsodium（MS）on soil nitrification and several related enzyme activities.
The paper also conducted correlation analysis on certain targets， which might influence the contents of nitrate nitrogen in Pic treatment group. The results revealed that soil nitrate nitrogen concentration decreased significantly after all these 4 fumigantion treatments．Among them， the inhibition on soil nitrification by Pic，1，3-D and MS treatments could last for 28-56 days，while the DMDS treatment could only last about 7 days．All fumigation
treatment showed different inhibition levels on soil glutamine enzyme and asparagine enzyme．Pic showed significant promoting effect on soil protease activity，while on the contrary MS showed strong inhebitory effect．The correlation coefficients between NO3--N and NH4+-N，NO3--N and DON，NO3--N and DAA，NO3--N and SMBN were -0.977，0.887，-0.628 and -0.645， respectively and all of the correlation reached significant or very significant level．
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Received: 03 January 2014
Published: 05 August 2014
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WANG Jiaomin1，LV Hailong1，ZHANG Dan1，CAO Liqiang1，GUO Zijun1，XIE Shuqin1*，CHENG Yonglong1，YUN Wenjun2. A New Pepper F1 Hybrid—‘Sujiao No.19’[J]. China Vegetables, 2023, 1(2): 109-111. |
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