生物质炭对冬小麦产量、水分利用效率及根系形态的影响

被引:99
作者
李中阳 [1 ,2 ,3 ]
齐学斌 [1 ,2 ,3 ]
樊向阳 [1 ,2 ,3 ]
吴海卿 [1 ,2 ,3 ]
杜臻杰 [1 ,2 ,3 ]
李平 [1 ,2 ,3 ]
吕谋超 [1 ]
机构
[1] 中国农业科学院农田灌溉研究所
[2] 中国农业科学院河南新乡农业水土环境野外科学观测试验站
[3] 中国农业科学院农业水资源高效安全利用重点开放实验室
基金
国家高技术研究发展计划(863计划);
关键词
作物; 水分; 土壤; 生物质炭; 产量; 根系形态;
D O I
暂无
中图分类号
S512.11 [];
学科分类号
摘要
为了探讨生物质炭对冬小麦产量、水分利用效率及根系形态的影响,该文利用田间小区试验研究了生物质炭不同施用水平对冬小麦产量、水分利用效率、根形态的影响及差异性。结果表明:生物质炭显著增加了冬小麦茎蘖数、有效穗数和产量(P<0.05),与对照相比,其增加比例范围分别为1.6%4.9%、0.7%1.5%、1.0%5.9%。冬小麦耗水量随着生物质炭施用量的增加而逐渐减小,水分利用效率由对照的17.06 kg/(hm2·mm)提高到17.69~19.57 kg/(hm2·mm)。生物质炭显著增加了冬小麦根系总根长和总表面积(P<0.05),在0~20和≥20~40 cm范围内,总根长的增加比例范围分别为2.8%14.6%、8.4%21.2%;总表面积增加比例范围分别为5.6%19.5%、1.9%13.6%。冬小麦根系形态特征与冬小麦产量呈极显著正相关(P<0.001)。各处理中以生物质炭施用量为40 t/hm2的处理对冬小麦产量、水分利用效率及根系生长的促进作用最为显著。该研究可为科学施用生物质炭提供参考。
引用
收藏
页码:119 / 124
页数:6
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