酸枣耗水尺度扩展参数研究

在河北省平山县岗南镇寺家沟村的田边地头随机选择17株直径大小不同的酸枣，通过测定其单株相关指标，建立酸枣单株耗水尺度扩展参数模型，以树高、地径、生物量作为基础，挖掘其与边材面积之间的回归关系，建立回归模型，并用实测值和相关系数等来选择回归模型。经过相关系数、模型、实测检验，并综合测定难易程度，确定酸枣耗水模型的扩展参数。结果表明，将酸枣耗水模型的扩展参数定为地径、地上部生物量、全株生物量3种。模型有，地径与边材面积为Y=045936D2地+088467D地-097092，R2=0997；全株生物量与边材面积为Y=26×10-12W3-11×10-7 W2+000215W+096432，R2=0994，中间模型为全株生物量与地径：W=92702 D2地-2366D地+15778，R2=1；地上部生物量与边材面积为Y=86×10-12W3上-26×10-7W2上+000321W上+107127，R2= 0940；中间模型为地上部生物量与地径：W上=68113 D2地-18902 D地+13509，R2=1000。

Water Consuming Scaling Parameter of Zizyphus jujuba var.spinosa

From Tanabe edge of a farm in Zhen Gang Temple home village,Pingshan County,Hebei Province, randomly selected 17 different diameter sizes Zizyphus jujuba var.spinosa as research material to measure related metrics of single plant,and then establish an expansion parameter of single Zizyphus jujuba var.spinosa water con-suming scaling.Base on the data of tree height,ground diameter,discussed regression relationship between the sapwood area and these parameters,and established a regression model.Moreover,we consulted the measured val-ues and correlation coefficient,and then choose the regression model.According to the correlation coefficient, model,measurement test,and how difficult it was to measure,we determined the expansion parameter of Zizyphus jujuba var.spinosa water consuming model.In the results,ground diameter,aboveground biomass and whole plant biomass were choosing as the expansion parameter of jujube water consuming model.The concrete model as follow-ing：ground diameter and sapwood area was Y=0.459 36D2g ＋0.884 67Dg-0.970 92,R2 =0.997;whole plant bi-omass and sapwood area was Y=2.6 ×10 -12W3 -1.1 ×10 -7W2 ＋0.002 15 W＋0.964 32,R2 =0.994;intermedi-ate models was whole plant biomass and ground diameter：W=927.02 D2g -2 366 Dg ＋1 577.8,R2 =1;aboveground biomass and sapwood area was Y=8.6 ×10 -12 W3a -2.6 ×10 -7 W2a ＋0.003 21 Wa ＋1.071 27,R2 =0.940;intermediate models was aboveground biomass and ground diameter：Wa =681.13 D2g -1 890.2 Dg ＋1 350.9,R2 =1.000.