Component characteristic and agricultural utilization risk of household waste in mountainous rural area
The components and physical-chemical properties as well as their annual changes of rural household solid wastes were investigated in Liandu district, Lishui city, Zhejiang Province, as a representative of mountaineous rural areas. A long-term experiment was conducted to assess the risk of heavy meta...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2012-03-01
|
| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2012.02.014 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The components and physical-chemical properties as well as their annual changes of rural household solid wastes were investigated in Liandu district, Lishui city, Zhejiang Province, as a representative of mountaineous rural areas. A long-term experiment was conducted to assess the risk of heavy metal pollution and the potential of biodegradable organic waste fertilization in soybean-soybeanbroad bean cropping system. The results showed that the biodegradable organic waste was the major portion of rural household wastes, and the average proportion was 43.64%. Nutrien content (N + P<sub>2</sub>O<sub>5</sub> + K<sub>2</sub>O, dry mass) was about 3%, and organic matter average content was 24.9%, and their annual changes were very little. But the biodegradable organic wastes contained some heavy metals, and the contents changed greatly. Compared with conventional chemical fertilizer, application of waste organic fertilizer did not obviously change the yield of soybean in the first and second crop, and significantly increased the yield of broad bean in the third crop. Applying waste organic fertilizer had no significant effect on qualities and heavy metal contents of soybean and broad bean, was safe. Application of waste organic fertilizer significantly improved pH value, organic matter and total nitrogen contents of soil, also could enhance the heavy metal contents which had a gradual accumulation trend. Therefore, establishing a set of suitable classification and collecting system of rural household wastes, will effectively decrease amount of waste. Long-term application of waste organic fertilizer could increase agriculture production and improve soil fertility, but it also brought risk of heavy metal pollution, so application amount and time of waste organic fertilizer should be monitored and controlled. |
|---|---|
| ISSN: | 1008-9209 2097-5155 |