The Storage Capacity and Water-holding Characteristics of Pinus tabulaeformis Litters in Banchengzi Catchment

doi:10.13466/j.cnki.lyzygl.2018.01.007

Abstract

Abstract:

Banchengzi catchment was selected as the study area,and Pinus tabulaeformis was selected to investigate the stock volume and water-holding capacity of litter layers.The results showed that:(1) the stock volume of Pinus tabulaeformis litters was 21.86t/hm²,of which the volume of undecomposed litters was 7.04t/hm² and accounted for 32.20%,the volume of half decomposition was 14.82t/hm² and accounted for 67.80%,and indicated that the volume of undecomposed litters was larger than undecomposed litters;(2) litters volume was significant with leaf area index(LAI),and increased with larger LAI;(3) the water holding of litters showed a process of “rapid absorption-slow absorption-gradual saturation”,the absorption rate decreased with immersion time,and showed a power function relationship(V=ktⁿ).The research results can provide references for forest management and water holding monitoring process in catchments.

Key words: Banchengzi catchment, Pinus tabulaeformis, litters, stock volume, water holding characteristics

CLC Number:

S718.5

ZHENG Guilian, GONG Yinting, WANG Yan. The Storage Capacity and Water-holding Characteristics of Pinus tabulaeformis Litters in Banchengzi Catchment[J]. FOREST RESOURCES WANAGEMENT, 2018, (1): 44-49.

Figures/Tables 8

Tab.1

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Tab.2

Tab.3

The fitting relationship between water absorption rate of litters and immersion time

层	拟合关系	决定系数
未分解层	y=206.33 $x - 1 . 457$	R²=0.7403
半分解层	y=103.81 $x - 1 . 597$	R²=0.8565

Tab.3

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样地编号	经度/(°)	纬度/(°)	海拔/m	土壤厚度/cm	坡度/(°)
1	116.9373	40.6237	339	35	13
2	116.937	40.622	351.7	45	8
3	116.9366	40.6367	509.4	40	10
4	116.945	40.6332	391.6	35	30
5	116.9832	40.6216	284.6	37	35
6	116.984	40.6234	321.3	42	25
7	116.9899	40.6431	332.7	39	40
8	116.9803	40.6432	359	55	30
9	116.9763	40.6446	370.2	61	35
10	116.9696	40.6466	394	47	8
11	116.9985	40.6577	349.4	35	35
12	116.9971	40.6567	326.1	45	30
13	116.9967	40.6563	334.8	45	35
14	116.9964	40.6569	355.8	39	25
15	116.9947	40.6603	346.3	48	15
16	116.9942	40.6654	338	42	30
17	116.9894	40.6735	435.9	36	35
18	116.9862	40.669	391.5	49	15
19	116.9854	40.663	352.3	57	20
20	116.9828	40.6631	374.3	31	30
21	116.967	40.6657	387.9	55	20
22	116.9669	40.6661	385.9	46	25
23	116.9935	40.6569	343.4	44	40
24	116.9574	40.6693	442.8	35	30
25	116.9516	40.669	456.2	46	25
26	116.9621	40.6728	434.3	53	35
27	116.9603	40.673	410.3	48	30
28	116.9954	40.6529	321.6	47	30
29	116.9678	40.6778	454.4	39	25

浸水时间/h	未分解层	半分解层
0.25	2527.09	1559.51
0.5	184.06	166.42
1	134.80	41.29
2	99.87	43.82
4	73.89	26.54
6	35.83	24.02
8	37.00	4.32
10	8.18	2.53
12	0.45	0.42