Water-holding capacity of litter and soil under major pure plantation in hilly region of central Hubei | 鄂中低丘区主要纯林凋落物持水与土壤贮水能力研究

Chinese. 以湖北省京山县太子山林场内马尾松、柏木、杉木和麻栎四类人工纯林不同龄组林下的凋落物和土壤为研究对象，对其持水性能进行研究。结果表明：柏木近熟林凋落物层现存量最大（15.53 t/hm. ），麻栎幼龄林凋落物总现存量最小（2.39 t/hm. ）；麻栎林各龄组的凋落物最大持水率均高于其余三类针叶林对应龄组，但是柏木近熟林的最大持水量（29.82 t/hm. ）和有效拦蓄量（23.76 t/hm. ）均为最大，其次为柏木中龄林、马尾松近熟林和麻栎近熟林，说明柏木中龄林和近熟林凋落物对降水的拦蓄能力最强；麻栎林各龄组0-40 cm土层滞留贮水量和吸持贮水量均高于其余三类纯林；在中龄林、近熟林内，麻栎林土壤贮水能力最强（分别为2 182.4、2 658.2 t/hm. ），马尾松林最弱（分别为1 291.8、1 739.8 t/hm. ）。

English. Studies of the water-holding capacity of litters and soil under the plantations of different age groups was carried out in four types of pure stands （such as Pinus massoniana forest, Cupressusfunebris forest, Cunningharnia lanceolata forest and Quercus acutissirna forest） in Taizishan Forest Farm, Hubei Province. The results showed that the nearly-mature stand of C. funebris forest had the biggest total litter amount（15.53 t/hm. ）, the juvenile stand of Q. acutissima forest had the smallest total litter amount（2.39 t/hm. ）; the maximum water-holding ratio of the litter in Q. acutissima forests of three different age groups were the highest compared with other stand types. However, the maximum water-holding capacity and effective retain capacity of the nearly-mature C. funebris stand were biggest, reaching up to 29.82 t/hm. and 23.76 t/hm. , respectively, with middle-aged C. funebris stand, nearly- mature P. massoniana stand and nearly-mature Q. acutissima stand following it. The litters of middle- aged stand and the nearly-mature stand of C. funebris have superior effective retain capacity. The NC- WHC （non-capillary water-holding capacity） and CWHC（capillary water-holding capacity） of three different-aged Q. acutissima stands below the depth of soil layer（0-40 cm） were more than others. Among the middle-aged stands and the nearly-mature stands,water-holding capacity of soil under Q. acutissima plantation was maximum（2 182.4 t/hme and 2 658. 2 t/hme, respectively） ,water-holding capacity of soil under P. massoniana plantation was minimum（1 291.8 t/hm. and 1 739.8 t/hm. ,respectively）.