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为了在不破坏石漠化草场脆弱植被的情况下定株连续观测灌木产量,试验对杭子梢[Campylotropis macrocarpa(Bunge)Rehd]、多花木兰(Indigofera amblyatha Craib)和白刺花(Sophcra viciifolia Benth)3种灌木形态特征指标进行了测定,并进行了灌木产量之间的相关性分析,建立各种灌木形态特征指标与灌木产量之间回归模型的方法。结果表明:灌木等级间株高和平均冠幅直径均存在显著差异(P<0.05);灌木等级(x1)、株高(x2)和平均冠幅直径(x3)与产量(y)呈极显著相关(P<0.01),回归模型:杭子梢y=-1 091.314+155.862x1+5.223x2+5.764x3;多花木兰y=-61.624-17.387x1+1.321x2+2.969x3;白刺花y=-172.292+5.491x1+1.024x2+3.588x3。说明通过测量灌木等级、株高和平均冠幅直径就能准确估测灌木单株鲜草产量。
In order to observe the shrub yield continuously without damaging the fragile vegetation in the rocky desertification pasture, the effects of Campylotropis macrocarpa (Bunge) Rehd, Indigofera amblyatha Craib and Sophcra viciifolia Benth The morphological characteristics of three shrubs were determined, and the correlations between shrub yield were analyzed. A regression model was established between the morphological characteristics of shrubs and shrub yield. The results showed that there were significant differences in plant height and average crown diameter between shrubs (P <0.05). Shrub grade (x1), plant height (x2) and average crown diameter (x3) (P <0.01). The regression model was: Hangzhou pedicle y = -1 091.314 + 155.862x1 + 5.223x2 + 5.764x3; Magnolia y = -61.624-17.387x1 + 1.321x2 + 2.969x3; -172.292 + 5.491x1 + 1.024x2 + 3.588x3. This shows that the yield of fresh shrubs per plant can be estimated accurately by measuring the shrub grade, plant height and average crown diameter.