Synergy effects of biochar and polyacrylamide on plants growth and soil erosion control
Synergy effects of biochar and polyacrylamide on plants growth and soil erosion control
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DOI：
10.1007/s12665-015-4262-5
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发表时间：
2015-08-01
影响因子：
2.8
通讯作者：
Ok, Yong Sik
中科院分区：
文献类型：
--
作者：
Lee, Sang Soo;Shah, Haleem S.;Ok, Yong Sik
土壤有机碳（SOC）是决定土壤质量或肥力的最关键因素之一。近年来的研究表明，土壤侵蚀导致的土壤有机碳严重退化已成为世界各国农业发展的趋势。为了保持土壤质量或生产力，最近有人建议使用生物炭（BC）或阴离子聚丙烯酰胺（PAM）;然而，迄今为止，BC和PAM的组合效果尚未报道。本研究评价了BC、PAM及其混合物（BC？PAM）对土壤质量、植物生长、径流和土壤流失的影响。BC的施用促进了大豆（C-3型）和玉米（C-4型）植株的生长，并保持了土壤的持水性和稳定性等物理性质。结果表明，BC+PAM对植物生长的促进作用最好，其他几种施用方式也不差。由于碳源充足，BC的添加可能导致植物，特别是C3植物的代谢性能提高。对于径流和土壤流失测试，所有的修正案增加径流相比，控制可能是由于堵塞土壤孔隙的粘性PAM溶液的应用和减少土壤流失，由于粘土絮凝和团聚体稳定的PAM，和水吸附能力的BC。BC+PAM是促进植物生长和减少土壤流失的一种新的、优良的策略，但在实际应用之前，应仔细考虑最佳施用方法。
Soil organic carbon (SOC) is one of the most critical factors determining soil quality or fertility. Recent survey has reported the severe degradation of SOC by soil erosion in agricultural fields throughout the world. To maintain soil quality or productivity, biochar (BC) or anionic polyacrylamide (PAM) has been recently suggested; however, the combination effects of BC and PAM have not been reported to date. This study evaluated the effect of BC, PAM or their mixture (BC? PAM) on soil quality, plant growth, and runoff and soil loss under simulated and natural rainfalls. Applications of BC promoted growth of soybean (C-3 type) and maize (C-4 type) plants and maintained soil physical properties such as water retention and stability. Our findings showed that BC+PAM was the best for plant growth, even other subject amendments were not worse. Addition of BC may lead to accelerate the metabolic-performance capacity of plants, especially C3 plant, due to sufficient C source. For runoff and soil loss tests, all amendments increased runoff compared to the control possibly due to clogging soil pore by viscous PAM solution application and decreased soil loss due to clay flocculation and aggregate stabilization by PAM, and water adsorbing capacity of BC. The use of BC+PAM can be a new, excellent strategy to promote plant growth and reduce soil loss; however, optimum application method should be considered carefully prior to its practical use.