【摘要】 1999年 7月 ,从广西引进半年生巨尾桉组培苗 ,在攀枝花市仁和地区试种 34hm2 。测定结果 2 4年生巨尾桉林分的平均胸径为 6 1cm ,平均树高为 6 6m ,平均立木蓄积量为 32 33m3 ·hm-2 ;林分生物量及生产力分别为 2 5 85t·hm-2 和 10 77t·hm-2 ·a-1;林地枯枝落叶累积量及其最大吸水量分别为 7 11t·hm-2 和37 0t·hm-2 ,分别比草坡地高 2倍～ 5倍 ;林地土壤 (0～ 4 0cm)容量为 1 36g·cm-3 ～ 1.4 5g·cm-3 ,比草地略低 ;土壤总孔隙度及通气度分别为 5 1 2 9%～ 6 2 32 %和 19 5 5 %～ 2 6 38% ,分别比草地略高 ;土层最大、毛管及最小持水量分别为 34 93%～ 4 5 31%、31 5 4 %～ 39 82 %、2 1 94 %～ 2 6 32 % ,相应比草地略高 ;林内日平均气温及日较差分别为 2 2 2℃～ 2 3 1℃和 4 4℃～ 8 9℃ ,分别比草地低 0 2℃～ 2 4℃ ;林内空气相对湿度日均值为 80 %～ 88% ,比草地高 3%～ 16 %。初步显示出巨尾桉人工幼林的生态经济效益更多还原

【Abstract】 In July 1999,half year old tissue culture seedlings of Eucalytus grandis×urophylla(E.G×U )were introduced from Guangxi,foresting 34 hm 2 in Renhe region of Panzhihua City.The results have shown that 2.4 years old stands of E.G×U have 6.1 cm in diameter,6.6 m in height,32 33 m 3·hm -2 in volume,25 85 t·hm -2 in biomass,and 10 77 t·hm -2 a -1 on average.The litter accumulated weight in E.G×U is 7 11 t·hm -2 ,and its maximun moisture capacity is 37 0 t·hm -2 respectively,which are 2～5 double higher than that in lawn.The soil(0～40 cm)volume weight in E.G×U is 1.36 g·cm -3 ～1.45 g·cm -3 than that in lawn.Total porosity is 50.29%～60.30% and aeration porosity is 19.55～26.38% higher than that in lawn.The maximun moisture capacity of E.G×U is 34 93%～45 31%,capillary capacity is 31 54%～39 82% and minimun field capacity is 21 94%～26 32% higher than that in lawn.Mean daily air temperature of E.G×U is 22 2℃～23 1℃ and dailly range is 4 4℃～8 9℃,and is 0 2℃～2 4℃ lower than that in lawn.Mean daily relative humidity in E.G×U is 80%～88%,and is 3%～16% higher than that in lawn.Ecological and economic effects of the E.G×U plantation have shown preliminarily.更多还原