本文選題：三峽庫區(qū) + 消落帶�。� 參考：《西北農(nóng)林科技大學(xué)學(xué)報(自然科學(xué)版)》2017年04期

【摘要】：【目的】研究不同樹種對三峽庫區(qū)消落帶土壤物理性質(zhì)的影響,為三峽庫區(qū)消落帶植被恢復(fù)與重建提供科學(xué)依據(jù)�！痉椒ā恳灾貞c市主城區(qū)消落帶植被恢復(fù)治理示范區(qū)石門段2個樹種(南川柳純林和楓楊純林)林下土壤為研究對象,以相鄰荒地土壤為對照,對3月(消落帶出露期)至7月(消落帶旱季)的土壤體積質(zhì)量、土壤孔隙度、土壤持水量等物理性質(zhì)進(jìn)行比較�！窘Y(jié)果】3月,楓楊林下土壤物理性質(zhì)與荒地土壤差異不大,3個土層平均土壤總孔隙度(23.05%)、田間持水量(69.51g/kg)甚至略遜于荒地土壤(27.88%和86.24g/kg);7月,楓楊林下土壤物理性質(zhì)明顯優(yōu)于荒地土壤。3月,南川柳林下土壤物理性質(zhì)優(yōu)于楓楊林下土壤;7月,楓楊林下土壤物理性質(zhì)明顯優(yōu)于南川柳林下土壤。與3月相比,7月南川柳土壤物理性質(zhì)指標(biāo)均出現(xiàn)小幅下降,但變化不顯著;楓楊林下土壤由于毛管孔隙顯著增加(3個土層毛管孔隙度平均值由18.86%增加至41.20%),土壤物理性質(zhì)指標(biāo)均顯著提高;荒地土壤物理性質(zhì)未出現(xiàn)顯著變化�！窘Y(jié)論】2種三峽庫區(qū)消落帶適生樹種的林下土壤物理性質(zhì)存在明顯差異,但均能對消落帶土壤物理性質(zhì)起到保護(hù)和改善作用。
[Abstract]:[objective] to study the effects of different tree species on the physical properties of soil in the three Gorges Reservoir area. To provide the scientific basis for vegetation restoration and reconstruction in the three Gorges Reservoir area. [methods] the soil under the forest of two tree species (Liuchun forest and pure Fengyang forest) in the demonstration area of vegetation restoration and treatment in the main urban area of Chongqing was studied. The physical properties of soil volume mass, soil porosity and soil water holding capacity from March to July (dry season) were compared with those of adjacent wasteland soils. [results] in March, the soil volume mass, soil porosity and soil water holding capacity were compared between March and July (dry season). [results] in March, the soil volume mass, soil porosity and soil water holding capacity were compared. There was no significant difference between the physical properties of the soil under the forest and the wasteland soil. The average total porosity of the three soil layers was 23.05%, and the field water holding capacity of 69.51 g / kg) was slightly lower than that of the wasteland soil (27.88% and 86.24 g / kg 路kg ~ (-1). In July, the physical properties of the soil under the forest were obviously better than those of the wasteland soil. The physical properties of the soil under the willow forest in Nanchuan were better than those under the forest of Maple poplar, and in July, the physical properties of the soil under the forest were obviously better than those under the willow forest in Nanchuan. Compared with March, the soil physical properties of Nanchuan willow decreased slightly in July, but the change was not significant. Because of the increase of capillary porosity (the average value of capillary porosity in three soil layers increased from 18.86% to 41.20%), the soil physical properties were significantly increased. There was no significant change in soil physical properties in wasteland. [conclusion] there were significant differences in soil physical properties between the two species, but both of them could protect and improve the soil physical properties.
【作者單位】： 西南大學(xué)資源環(huán)境學(xué)院林學(xué)系;
【基金】：國家自然科學(xué)基金項目(31370602)
【分類號】：S714.2

【相似文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 馬朋;三峽庫區(qū)消落帶水杉種植初期對實(shí)生土壤營養(yǎng)元素含量及酶活性的影響[D];西南大學(xué);2015年

2 何熙;三峽庫區(qū)消落帶土壤（沉積物）總汞及甲基汞變化特征[D];西南大學(xué);2013年

，

本文編號：1818426