论文部分内容阅读
采用田间微区试验方法,研究不同生物炭添加量[0(CK)、22.5 t/hm2(C1)、67.5 t/hm2(C2)和112.5 t/hm2(C3)]对玉米不同生长期土壤有机碳(SOC)、微生物生物量碳(MBC)、玉米生长和产量的影响。结果表明,生物炭添加提高了土壤MBC和SOC含量,处理组C1、C2和C3的SOC含量较对照组CK增加20.9%、57.25%和93.23%,并且MBC占SOC比例的变化表明生物炭的添加促进了土壤MBC对土壤有机质(SOM)的贡献。另外,在生物炭添加处理下,土壤含水量和土壤MBC呈显著的正相关。生物炭的添加增加了开花期玉米的株高、茎粗、叶面积指数以及成熟期玉米的百粒重和产量。相比于对照组CK,处理组C2和C3株高增加15.99%、21.55%,茎粗增加13.77%、9.64%,产量增加23.23%、23.12%;处理组C1、C2和C3叶面积指数高于CK 13.89%、44.52%和47.26%。
Field experiment was conducted to study the effects of different biochar dosages (CK, 22.5 t / hm2 (C1), 67.5 t / hm2 (C2) and 112.5 t / hm2 Carbon (SOC), microbial biomass carbon (MBC), maize growth and yield. The results showed that the biochar addition increased soil MBC and SOC content, and the SOC content of treatments C1, C2 and C3 increased by 20.9%, 57.25% and 93.23% compared with control CK, and the change of MBC in SOC showed that the biochar addition Promoted the contribution of soil MBC to soil organic matter (SOM). In addition, under the biochar addition process, the soil moisture content and soil MBC showed a significant positive correlation. The addition of biochar increased plant height, stem diameter, leaf area index, and 100-grain weight and yield of maize at flowering stage. Compared with the control CK, the plant height of C2 and C3 increased 15.99% and 21.55%, the stem diameter increased 13.77% and 9.64% and the yield increased 23.23% and 23.12% respectively. The leaf area index of C1, C2 and C3 in the treatment group was higher than CK 13.89%, 44.52% and 47.26%.