本文選題：黃河源 + 封育��； 參考：《中國(guó)草地學(xué)報(bào)》2017年05期

【摘要】：以青海省瑪沁縣不同封育年限與自然放牧的高寒草甸為研究對(duì)象,通過對(duì)土壤容重、土壤飽和持水量、田間持水量及毛管持水量等指標(biāo)監(jiān)測(cè),分析不同封育年限下高寒草甸的土壤持水能力及與環(huán)境因素的關(guān)系。結(jié)果表明:隨著封育年限延長(zhǎng),封育樣地0~40cm土層土壤持水量增加,其中0~10cm土層的土壤持水量高于10~20cm和20~40cm;封育12a后土壤飽和持水量、田間持水量、毛管持水量分別增加11.34mm、15.14mm、15.05mm,分別按0.95mm/a、1.26mm/a、1.25mm/a的速率增加;土壤飽和持水量、田間持水量和毛管持水量與容重呈極顯著負(fù)相關(guān)(P0.01),與有機(jī)質(zhì)及地下生物量呈極顯著或顯著性正相關(guān)(P0.05或P0.01);土壤持水能力在垂直方向表現(xiàn)為表層高于深層,在封育禁牧梯度上表現(xiàn)為封育高于未封育。研究表明,封育能提高土壤持水能力。
[Abstract]:The alpine meadow with different fencing years and natural grazing in Maqin County of Qinghai Province was studied. The soil bulk density, saturated soil water holding capacity, field water holding capacity and capillary water holding capacity were monitored. The relationship between soil water holding capacity of alpine meadow and environmental factors was analyzed. The results showed that the soil water holding capacity of 0~40cm soil layer increased with the extension of fencing time, and the soil water holding capacity of 0~10cm soil layer was higher than that of 10~20cm and 20 ~ 40 cm soil layer, and the saturated soil water holding capacity and field water holding capacity of 0~10cm soil layer were higher than that of 10~20cm and 20 ~ 40 cm soil layer after 12 years of closure. The capillary water holding capacity increased by 11.34mm / 15.14mm / 15.05mm, respectively, and increased at the rate of 0.95mm / a 1.26mm / a 1.25mm / a, respectively. Field water holding capacity and capillary water holding capacity were negatively correlated with bulk density (P0.01), and were significantly or positively correlated with organic matter and underground biomass (P0.05 or P0.01), and soil water holding capacity in vertical direction was higher than that in deep layer. On the gradients of fencing and forbidding, fencing was higher than that of unfenced. The results show that the soil water holding capacity can be improved by fencing.
【作者單位】： 中國(guó)科學(xué)院西北高原生物研究所;中國(guó)科學(xué)院大學(xué);中國(guó)科學(xué)院高原生物適應(yīng)與進(jìn)化重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)研究計(jì)劃(2016YFC0501802) 青海省國(guó)際合作項(xiàng)目(2015-HZ-801)項(xiàng)目 青海省自然基金(2016-ZJ-943Q)
【分類號(hào)】：S812.2

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