Chi tiết| Tên | Biochar Treatment and its Effects on Rice and Vegetable Yields in Mountainous Areas of Northern Vietnam |
| Lĩnh vực | Tài nguyên-Môi trường |
| Tác giả | Vinh NC. 1* , Hien NV. 1 , Anh MTL. 2 , Johanes Lehmann3 , Stephen Joseph4 |
| Nhà xuất bản / Tạp chí | International Journal of Agricultural and Soil Science Tập 2 Năm 2014 |
| Số hiệu ISSN/ISBN | ISSN:2315-998 |
| Tóm tắt nội dung | |
In Vietnam, uplands cover ‘3/4 total area, where most of ethnic minority groups reside on. They have a
low living standard that is poor and nearly poor standard. Rice and vegetable production play an
important role in food security. However, agricultural production faces soil degradation problems. Due
to soil erosion and over exploited cultivation, soil is becoming degraded in both quality and quantity,
causing low crop yield and quantity. In addition, environment degradation is also a significant barrier
for the course of hunger elimination and poverty reduction as well as sustainable development for
communities in mountainous regions. This study is to contribute to agricultural sustainable production
by providing new biochar technology; test and evaluate the efficiency of biochar application for rice
and vegetables in mountainous areas of Vietnam. Biochar functioning is soil fertility enrichment as well
as increase of efficiency compost for better crops and environment. To obtain this target, experiments
with different biochar rates (0.5 and 2.5 t/ha) with and without NPK and compost incubated with 5%
biochar (10 t/ha) were implemented to compare with NPK application for rice and vegetable in Thai
Nguyen and Thanh Hoa provinces. Result of experiment show that application of biochar for rice in the
first year has increased the plant nutrient uptake (NPK) for rice. If lonely application of 2.5t biochar/ha
for rice, grain yields were reduced by 24.7% in spring and 17.9% in summer rice. In comparison with
NPK treatment, rice yields were increased by 5.9-22.3% in treatments with biochar and by 26.3- 34.2%
in treatments of compost mixed with 5% biochar. Application of biochar for vegetables increased the
yields by 4.7-25.5%, compared with farmer practices in both sites.
In Vietnam, uplands cover ‘3/4 total area, where most of ethnic minority groups reside on. They have a low living standard that is poor and nearly poor standard. Rice and vegetable production play animportant role in food security. However, agricultural production faces soil degradation problems. Dueto soil erosion and over exploited cultivation, soil is becoming degraded in both quality and quantity,causing low crop yield and quantity. In addition, environment degradation is also a significant barrierfor the course of hunger elimination and poverty reduction as well as sustainable development forcommunities in mountainous regions. This study is to contribute to agricultural sustainable productionby providing new biochar technology; test and evaluate the efficiency of biochar application for riceand vegetables in mountainous areas of Vietnam. Biochar functioning is soil fertility enrichment as wellas increase of efficiency compost for better crops and environment. To obtain this target, experimentswith different biochar rates (0.5 and 2.5 t/ha) with and without NPK and compost incubated with 5%biochar (10 t/ha) were implemented to compare with NPK application for rice and vegetable in ThaiNguyen and Thanh Hoa provinces. Result of experiment show that application of biochar for rice in thefirst year has increased the plant nutrient uptake (NPK) for rice. If lonely application of 2.5t biochar/hafor rice, grain yields were reduced by 24.7% in spring and 17.9% in summer rice. In comparison withNPK treatment, rice yields were increased by 5.9-22.3% in treatments with biochar and by 26.3- 34.2%in treatments of compost mixed with 5% biochar. Application of biochar for vegetables increased theyields by 4.7-25.5%, compared with farmer practices in both sites.
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