摘要
为明确不同C/N配比对谷子的根系形态分布及土壤养分的影响,研究以晋谷21号为研究对象,设置5 个处理分别为 C1 15 g/m2 生物炭、C2 20 g/m2 生物炭、C3 25 g/m2生物炭,N1 3 g/m2 氮肥、N2 9 g/m2 氮肥交互的处理.结果表明:拔节期C2N2 谷子根系长度、根系总表面积、根系体积增幅分别为 134.06%、293.40%、500.00%;成熟期C2N2土壤铵态氮、硝态氮、速效磷、速效钾、有机碳增幅分别为 149.64%、139.00%、10.53%、20.83%和136.00%,综上所述,C2N2 配比能显著促进晋谷 21 根系的生长发育,调控土壤养分,存在最佳的配比.
Abstract
To clarify the effects of different C/N ratios on root morphology and distribution of millet,as well as soil nutrient level,'Jingu 21'was used as the object of the study.Five treatments were set,including C1(15g/m2 biochar),C2(20g/m2 biochar),C3(25g/m2 biochar),and N1(3g/m2 nitrogen fertilizer),N2(9g/m2 nitrogen fertilizer).C1 15g/m2 biochar,C2 20g/m2 biochar,C3 25g/m2 biochar and N1 3 g/m2 nitro-gen fertilizer,N2 9 g/m2 nitrogen fertilizer.The results showed that during the jointing stage,the root length,total root surface area,and root volume of C2N2 foxtail millet increased by 134.06%,293.40%,and 500.00%,respectively;The growth rates of ammonium nitrogen,nitrate nitrogen,available phosphorus,availa-ble potassium,and organic carbon in mature C2N2 soil were 149.64%,139.00%,10.53%,20.83%,and 136.0%,respectively.In summary,the C2N2 ratio can significantly enhance the growth and development of the root system of'Jingu 21',regulate soil nutrients with an optimal ratio.
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