Effect of cow manure biochar on maize productivity under sandy soil condition
Effect of cow manure biochar on maize productivity under sandy soil condition
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DOI：
10.1111/j.1475-2743.2011.00340.x
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发表时间：
2011-06-01
影响因子：
3.8
通讯作者：
Nishihara, E.
中科院分区：
文献类型：
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作者：
Uzoma, K. C.;Inoue, M.;Nishihara, E.
在本研究中，我们进行了温室实验，研究牛粪生物炭对旱地沙土的玉米产量、养分吸收和理化性质的影响。生物炭来源于在500摄氏度下热解的干牛粪。将牛粪生物炭与沙土以相当于每公顷0、10、15和20吨生物炭的比例混合。玉米被用作试验作物。研究结果表明，牛粪生物炭含有一些重要的植物营养素，对玉米作物的生长有显着影响。随着生物炭混合比例的增加，玉米产量和养分吸收显着提高。与对照相比，以 15 吨/公顷混合量和 20 吨/公顷混合量施用生物炭使玉米籽粒产量分别显着增加 150% 和 98%。配施量为10、15和20 t/ha时，玉米净水分利用效率（WUE）比对照分别提高6%、139%和91%。随着生物炭用量的增加，玉米籽粒的养分吸收显着增加。施用牛粪生物炭改善了沙质土壤的田间饱和导水率，从而提高了净WUE。收获后的土壤分析结果表明，pH、总碳、总氮、Oslen-P、可交换阳离子和阳离子交换容量显着增加。研究结果表明，在沙质土壤中施用牛粪生物炭不仅有利于作物生长，而且能显着改善粗质土壤的理化性质。
In this study, we performed a greenhouse experiment to investigate the effect of cow manure biochar on maize yield, nutrient uptake and physico-chemical properties of a dryland sandy soil. Biochar was derived from dry cow manure pyrolysed at 500 degrees C. Cow manure biochar was mixed with a sandy soil at the rate equivalent to 0, 10, 15 and 20 t biochar per hectare. Maize was used as a test crop. Results of the study indicated that cow manure biochar contains some important plant nutrients which significantly affected the maize crop growth. Maize yield and nutrient uptake were significantly improved with increasing the biochar mixing rate. Application of biochar at 15 and 20 t/ha mixing rates significantly increased maize grain yield by 150 and 98% as compared with the control, respectively. Maize net water use efficiency (WUE) increased by 6, 139 and 91% as compared with the control, with the 10, 15 and 20 t/ha mixing rate, respectively. Nutrient uptake by maize grain was significantly increased with higher biochar applications. Application of cow manure biochar improved the field-saturated hydraulic conductivity of the sandy soil, as a result net WUE also increased. Results of the soil analysis after the harvesting indicated significant increase in the pH, total C, total N, Oslen-P, exchangeable cations and cation exchange capacity. The results of this study indicated that application of cow manure biochar to sandy soil is not only beneficial for crop growth but it also significantly improved the physico-chemical properties of the coarse soil.