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本文探测了无机肥(磷和钾)对苗圃内培养的印度黄檀生长和结瘤的影响。播种前,磷和钾肥以不同比例混合后与营养匮乏的自然林土壤混合,然后混合土再补以粪肥(混合土:粪肥=3:1)。出苗后60天时记录植株结瘤状况(结瘤数、形状、鲜重、干重和颜色)和植株生长参数(枝条和根长及鲜重和干重、直径)。与对照相比,补充肥料的土壤显著地改变了植株生长和结瘤状况(P<0.05)。植株结瘤的数目、鲜重和干重均在磷钾施肥量为 160kg/hm2时达到最大值,分别为62, 0.05g和0.07g。不同比例的补肥处理改变了结瘤形状和颜色,同时显著地影响了枝条和根长、直径、鲜重和干重等生长参数。研究揭示:苗圃内生长的黄檀,在贫瘠的自然林土壤中施以160kg/hm2磷钾肥并混以粪肥(混合土:粪肥=3:1)可使植株生长和结瘤的形成达最佳。
This article explored the effects of inorganic fertilizers (P and K) on the growth and nodulation of Dalbergia chinensis grown in nurseries. Before sowing, phosphorus and potassium fertilizers are mixed in different proportions with the undernourished natural forest soils and mixed with manure (mixed soil: manure = 3: 1). Plant nodulation status (number of nodules, shape, fresh weight, dry weight and color) and plant growth parameters (shoot and root length and fresh weight and dry weight, diameter) were recorded 60 days after emergence. Compared to the control, soil supplemented with fertilizers significantly altered plant growth and nodulation (P <0.05). The number of plant nodules, fresh weight and dry weight all reached the maximum at phosphorus and potassium fertilization of 160kg / hm2, which were 62, 0.05g and 0.07g respectively. Different proportions of fertilizer treatments changed the nodule shape and color, and significantly affected the growth parameters such as shoot and root length, diameter, fresh weight and dry weight. The results showed that the growth of P. dahurica in nursery and the application of 160kg / hm2 phosphorous and potassium fertilizers combined with manure (mixed soil: manure = 3: 1) in the nurtured natural forest soil can promote the formation of plant growth and nodulation .