Effects of FeSO4 dosage on nitrogen loss and humification during the composting of cow dung and corn straw

被引：47

作者：

Mei, Juan ^{[1
,2
]}

Ji, Kai ^{[1
]}

Su, Lianghu ^{[3
]}

Wu, Mengting ^{[1
]}

Zhou, Xiaojie ^{[1
]}

Duan, Enshuai ^{[1
]}

机构：

[1] Suzhou Univ Sci & Technol, Sch Environm Sci & Engn, Suzhou 215009, Peoples R China

[2] Jiangsu Key Lab Environm Sci & Engn, Suzhou 215009, Peoples R China

[3] Minist Ecol & Environm, Nanjing Inst Environm Sci, Nanjing 210042, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2021年 / 341卷

基金：

中国国家自然科学基金;

关键词：

Aerobic composting; Ferrous sulfate; Humification; Nitrogen loss; MEDICAL STONE AMENDMENT; GASEOUS EMISSIONS; HUMIC SUBSTANCES; FERROUS SULFATE; HEAVY-METALS; WOODY PEAT; MANURE; SUPERPHOSPHATE; WASTE; BACTERIA;

D O I：

10.1016/j.biortech.2021.125867

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The effects of FeSO4 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 degrees C for 12- 17 days; the products had pH values of 6.4-7.6, electrical conductivities of 1.06-1.33 ms center dot cm(-1), NH4+-N contents of 37.2-61.8 mg kg(-1), and the seed germination index of 95%-101%. FeSO4 reduced nitrogen losses by 9.21-15.65% compared to the control group. FeSO4 also improved the compost humification process: the humus substances (HS) contents in the compost product with FeSO4 were 109.82-129.86 g center dot kg(-1), higher than 106.31 g center dot kg(-1) in the control group. The compost product in 3.75% FeSO4 treatment had the highest maturity degree. This study showed that FeSO4 could inhibit the mineralization of organic matter during the composting and accelerate the formation of HS.

引用

页数：10