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Effect and economic benefits of seeding amount and weeding methods on kenaf growth and soil available nutrients
Author(s): 
Pages: 1692-1697
Year: Issue:  10
Journal: Acta Agriculturae Zhejiangensis

Keyword:  rice-kenafprecision seedingweeding methodproduction efficiency;
Abstract: 以水稻—红麻轮作地为研究对象,进行了精量播种和不同除草方式对红麻生产效益影响的研究.结果表明:15万株·hm-2+除草剂处理的红麻生长速度最快,株高达455.23 cm;在整个生长期间,该处理的红麻茎粗、皮厚、单株鲜(干)叶重、单株鲜(干)骨重、单株鲜(干)皮重、单株鲜(干)生物量表现较好,均与其他处理存在显著性差异.小区干皮产量则以27万株·hm-2+除草剂处理最高,达6 772.50 g.后期小区的有效株数表现出喷除草剂>人工除草>不除草的趋势.各处理的土壤碱解氮和速效钾含量存在显著性差异,而土壤速效磷与有机质含量无显著差异.喷施除草剂对禾本科杂草的株防效和鲜重防效较好,均在77%以上.去掉种子与除草成本,单位面积产值最大的是27万株·hm-2+除草剂处理,其经济效益最佳.
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