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生物炭施用对水稻育秧土理化特性和秧苗素质的影响 预览 被引量:2

Effect of biochar addition on physicochemical properties of nursery soil and traits of rice seedlings
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摘要 【目的】明确生物炭在水稻育秧中的应用潜力。【方法】以木薯秸秆炭为材料,在不同播期条件下研究生物炭施用(φ为25%)对水稻育秧土理化特性、秧苗根系及地上部性状的影响。【结果】与对照相比,木薯生物炭施用改善了育秧土理化特性,木薯生物炭施用使育秧土容重降低了0.66g·cm–3,pH及有机质和碱解氮质量浓度分别增加了0.51、50mg·cm–3和195μg·cm–3,木薯生物炭施用促使水稻秧苗的根长、根系表面积、根体积、根系生物量和发根力分别提高了32.4%、30.1%、50.0%、13.7%和21.5%,秧苗叶面积、株高、茎基宽和地上部生物量分别提高了19.2%、8.0%、5.3%和10.2%。生物炭对水稻秧苗性状的影响在不同播期间存在一定差异,温度相对较低的播期生物炭对秧苗性状的影响达到显著水平。【结论】木薯生物炭提高了秧苗素质,在温度较低条件下,木薯生物炭更易培育壮秧,可作为水稻育秧基质的良好添加物。 【Objective】To understand the potential use of biochar in rice seedling nursery.【Method】Cassava straw biochar was used to determine the effects of biochar addition(φ=25%)on physicochemical properties of nursery soil,and root and shoot traits of rice seedlings under different sowing dates.【Result】Compared with control,cassava straw biochar improved the physicochemical properties of nursery soil,with bulk density decreased by0.66g·cm–3,pH,organic matter and alkalized nitrogen contents increased by0.51,50mg·cm–3and195μg·cm–3respectively.Besides,with the addition of cassava straw biochar,length,surface area,volume and biomass of root system and rooting ability increased by32.4%,30.1%,50.0%,13.7%and21.5%respectively,and leaf area,plant height,basal stem width and aerial biomass of seedlings increased by19.2%,8.0%,5.3%and10.2%respectively.The effect of biochar addition on rice seedling traits varied with sowing date.Biochar had significant effect on seedling traits on the sowing date under relatively lower temperature.【Conclusion】Biochar can improve the quality of rice seedlings,especially under relatively low temperature conditions.Biochar is a kind of beneficial additive of rice nursery soil.
出处 《华南农业大学学报》 CSCD 北大核心 2018年第1期40-44,共5页 JOURNAL OF SOUTH CHINA AGRICULTURAL UNIVERSITY
基金 国家自然科学基金(31460332)
关键词 生物炭 水稻 育秧土 理化特性 秧苗素质 biochar rice nursery soil physicochemical property seedling quality
作者简介 范龙(1993—),男,硕士研究生,E-mail: 1806889961@qq.com;通信作者: 黄敏(1984—),男,副教授,博士,E-mail: jxhuangmin@163.com
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