绿竹不同产地土壤养分含量的综合分析

Integrated Analysis of Soil Nutrient Contents from Different Production Areas of Dendrocalamopsis oldhami

分析了绿竹12个主要产地不同土壤层次的6项养分指标及其综合肥力状况。结果表明:土壤0~20 cm的养分含量普遍高于20~40 cm,更有利于促进笋竹营养生长。6项养分指标变异系数在9.7%~112.6%,依大小排列为有效磷>速效钾>全氮>有机质>水解氮>pH值,有效磷、速效钾含量属强变异,pH值属弱变异,这与绿竹产地土地利用状况有关联。应用主成分分析法分析,土壤中N,P,K与有机质含量首先综合反映了土壤的养分状况,其次是土壤pH值。将12个土壤综合得分值进行聚类分析,分为3组,第1组属浙南地区,综合得分值>2.0;第2组为浙南、闽西地区,综合得分范围在0.914~0.238;第3组包括闽南、闽东、闽中地区,综合得分范围在-0.337^-0.984。以行政区域为界划分出2大产区:浙江产区和福建产区。

6 nutrient indexes and the integrated soil fertility status of different soil layers from 12 main planting areas of Dendrocalamopsis olclhami were determined and analyzed. The results showed that the nutrient contents in 0 -20 cm soil layer were generally higher than those of in the 20 -40 cm layer, which were more important to the bamboo shoot growth. The variation coefficients of the 6 nutrient indexes ranged from 9.7% to 112.6%, with order of P（A） 〉 K（A） 〉 N（T） 〉 OM 〉 N（H） 〉 pH value. The variations of available P and available K were the biggest, while the variation of pH value was the lest, this was related to the land utilization status for D. oldhami cultivation. Three soil groups were classified according to the results of systemic clustering analysis with the compre- hensive values of the soil samples collected from 12 D. oldhami planting areas, i. e. , the group I was in south Zhejiang Province with the comprehensive scores over 2. 0; the group II was in south Zhejiang and west Fujian Province with the comprehensive scores from 0. 914 to 0. 238 ; the group III was in southern, eastern and the central parts of Fujian Province with comprehensive scores from -0. 337 to 0. 984. The 12 D. olclhami production areas were divided into two regions, i. e. , Zhejiang Region and Fujian Region.