基于灰色关联度法的不同紫花苜蓿品种氮、磷、钾养分重吸收评价

Assessment of the resorption of nitrogen,phosphorus and potassium in different alfalfa cultivars using grey correlative degree analysis

摘要:

植物养分重吸收是植物营养保留的重要方式之一,其受植物种类、环境和人为因素等而变化,体现一定的环境适应性。为了筛选环境适应力强的紫花苜蓿品种,试验测定了7个紫花苜蓿品种氮、磷和钾的养分重吸收效率及株高。采用灰色关联度分析法,对7个紫花苜蓿品种养分重吸收效率以关联度进行排序,对不同苜蓿品种环境适应性进行评价。结果如下:标靶和中原804重吸收效率的等权关联度和加权关联度排序均位于7个品种的前两名;中原804和标靶的株高排序位于7个紫花苜蓿品种的前两名;株高与重吸收效率的加权关联度排序显著相关。因此,从综合养分重吸收效率、株高角度判断,在7个紫花苜蓿品种中标靶和中原804具有较强环境适应力,建议鲁南地区种植。

Abstract:

Plant nutrient resorption is one of the important ways of plant nutrition preservation,which differs with plant species,environmental and human factors.It reflects the environmental adaptability.In order to select the best adaptable cultivars,seven alfalfa cultivars were assessed on their resorption efficiencies of nitrogen,phosphorus,and potassium as well plant height.The resorption efficiencies of seven alfalfa cultivars were comprehensively analysed using grey correlative degree analysis to evaluate the environmental adaptability of different alfalfa cultivars.The results were as follows:Biaoba and Zhongyuan 804 were the first two cultivars in the seven alfalfa cultivars in the order of grey correlative degree and weighted grey correlative degree (WGCD);the plant height of Biaoba and Zhongyuan 804 were also the first two cultivars among the seven alfalfa cultivars ;there was significant correlation between the plant height and the order of weighted grey correlative degree of resorption efficiency.Therefore,based on the comprehensive nutrient reabsorption efficiency and plant height,the best environmental adaptability of alfalfa cultivars were the Biaoba and Zhongyuan 804 which should be recommended to plant in Lunan area.