硫酸亚铁用量对牛粪与玉米秸秆堆肥过程中氮素损失及腐殖化的影响
Effects of FeSO dosage on nitrogen loss and humification during the composting of cow dung and corn straw.
作者信息
Mei Juan, Ji Kai, Su Lianghu, Wu Mengting, Zhou Xiaojie, Duan Enshuai
机构信息
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; Jiangsu Key Laboratory of Environmental Science and Engineering, Suzhou 215009, China.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
出版信息
Bioresour Technol. 2021 Dec;341:125867. doi: 10.1016/j.biortech.2021.125867. Epub 2021 Sep 2.
The effects of FeSO on nitrogen loss and humification were investigated in the composting of cow dung and corn straw. The results showed that all groups met the ripening requirements after 50 days: the temperature was above 50 °C for 12- 17 days; the products had pH values of 6.4-7.6, electrical conductivities of 1.06-1.33 ms·cm, NH-N contents of 37.2-61.8 mg kg, and the seed germination index of 95%-101%. FeSO reduced nitrogen losses by 9.21-15.65% compared to the control group. FeSO also improved the compost humification process: the humus substances (HS) contents in the compost product with FeSO were 109.82-129.86 g·kg, higher than 106.31 g·kg in the control group. The compost product in 3.75% FeSO treatment had the highest maturity degree. This study showed that FeSO could inhibit the mineralization of organic matter during the composting and accelerate the formation of HS.
在牛粪和玉米秸秆堆肥过程中研究了硫酸亚铁（FeSO）对氮素损失和腐殖化的影响。结果表明，所有组在50天后均满足腐熟要求：温度在50℃以上持续12 - 17天；产品的pH值为6.4 - 7.6，电导率为1.06 - 1.33 ms·cm，铵态氮（NH-N）含量为37.2 - 61.8 mg/kg，种子发芽指数为95% - 101%。与对照组相比，硫酸亚铁使氮素损失降低了9.21% - 15.65%。硫酸亚铁还改善了堆肥的腐殖化过程：添加硫酸亚铁的堆肥产品中腐殖物质（HS）含量为109.82 - 129.86 g/kg，高于对照组的106.31 g/kg。3.75%硫酸亚铁处理的堆肥产品成熟度最高。本研究表明，硫酸亚铁可在堆肥过程中抑制有机物矿化并加速腐殖物质的形成。
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