Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Chine → 2002 → Study on Hydrological Effect of Seabuckthorn Plantation in Semi-arid Loess Hilly Region

Northwest University of Science and Technology (2002)

Study on Hydrological Effect of Seabuckthorn Plantation in Semi-arid Loess Hilly Region

陈云明;Chen Yun Ming

Titre : Study on Hydrological Effect of Seabuckthorn Plantation in Semi-arid Loess Hilly Region

Auteur : 陈云明;Chen Yun Ming

Grade : Doctoral Dissertation 2002

Université : Northwest University of Science and Technology

Résumé partiel
Seabuckthorn is a few of tree species that can grow in zones of forest, forest steppe and typical prairie on the Loess Plateau. Seabuckthorn is a main tree species of conserving soil and water, improving ecological environment on the Loess Plateau, especially its semi-arid loess hilly region. However, if the inferior conditions such as lack of soil water, severe loess of soil and water, scurviness ecological environment can restrict the sustainable development of seabuckthorn stand ? What is the main pattern of vegetation construction of seabuckthorn in the semi-arid loess hilly region in the future ? These are important problems that should be solved in the current construction of ecological environment urgently. Aimed to the above problems, the systematic studies on hydrological effect of seabuckthorn stands in Zhifanggou watershed belonging to semi-arid loess hilly region. The main results are as follows:1. Hydrological effects of canopy and litter layer of seabuckthorn are remarkable. Annual intercepting rate of canopy of 6 10 ages sebuckthorn stands on rainfall is 5.9%, the rate has a power correlation with the age and canopy density. Litter layer of 5 10 ages seabuckthorn stands can hold 0.5 8-1.19mm rainfall, its maximum hold capacity of rainfall has a remarkable power correlation with canopy density and accumulation. Transpiration intensity of seabuckthorn has relationship with soil moisture condition. Daily change of transpiration intensity is single apex curve with enough soil water and double apices curves with lack of soil moisture. Monthly change curve of transpiration intensity in growing season is single apex type and its mean value is 0.658 g/g.h. Consumption of transpiration is the lowest in May and the highest in July in the growing season.2. To cover soil with litter can increase the capability of soil infiltration and soil anti-scourability in horizon. Rate of infiltration of seabuckthorn stand is larger than barren slope, its difference is decreasing with infiltration time. Mean infiltration rate of seabuckthorn stand has relationship with litter layer covering soil and rainfall intensity. Litter coverage of litter layer can increase mean infiltration rate of soil. Soil erosion in. the stands won’t occur when the thickness of litter layer covering soil is above 2cm. Soil anti-scourability in seabuckthorn stand is better than barren slope, which has relation with distribution of the root (^Imm). Soil anti-erodibility of seabuckthorn stand in horizon is better than the lower soil layer and it increases with seabuckthorn age.3. seabuckthorn stand has remarkable effect on reducing runoff compared with barren slope. Its effect increases along with seabuckthorn age.

Mots clés : sebuckthorn stand; hydro logical effect; soil moisture; soil and water conservation;

Présentation (CNKI)

Page publiée le 26 avril 2013, mise à jour le 20 avril 2018