本文關(guān)鍵詞：退化柞蠶林封育對(duì)枯落物和表層土壤持水效能的影響　出處：《生態(tài)學(xué)報(bào)》2016年03期 　論文類型：期刊論文

  更多相關(guān)文章： 退化柞蠶林 枯落物 土壤 持水量

【摘要】：柞蠶林是遼東山區(qū)退化最嚴(yán)重的森林類型之一,因多年反復(fù)刈割導(dǎo)致生長(zhǎng)逐漸衰退、更新能力下降,局部出現(xiàn)空地甚至土壤開(kāi)始砂化,涵養(yǎng)水源和保持水土等生態(tài)功能明顯降低。以遼東山區(qū)的退化柞蠶林為研究對(duì)象,分析了在封育9、12、21a后森林的枯落物及表層土壤持水效能。結(jié)果表明:退化柞蠶林經(jīng)過(guò)封育恢復(fù)后,封育恢復(fù)時(shí)間越長(zhǎng),林地枯落物累積量增加的越顯著,枯落物持水能力和有效攔蓄降雨能力提高也越明顯。對(duì)照(未封育)、封育9、12、21a柞蠶林枯落物儲(chǔ)量分別為3.69、7.92、8.41 t/hm~2和8.74 t/hm~2;最大持水量分別為6.23、14.71、15.81 t/hm~2和17.18 t/hm~2,有效攔蓄量分別為4.78、10.87、11.70、12.78 t/hm~2�？萋湮锍炙颗c浸水時(shí)間存在顯著的相關(guān)關(guān)系(P0.001),自然對(duì)數(shù)模型模擬擬合效果最好(R~20.9)。退化柞蠶林經(jīng)過(guò)封育恢復(fù)后,表層土壤水文物理性質(zhì)的改善隨著封育恢復(fù)時(shí)間的增加而越來(lái)越明顯,封育9、12和21年柞蠶林表層土壤容重分別比對(duì)照退化柞蠶林降低了5.51%、12.60%、17.32%,毛管持水量分別增加了7.01%、28.98%、54.83%,非毛管持水量分別增加了46.14%、126.19%、187.19%。本研究結(jié)果說(shuō)明退化柞蠶林封育能夠通過(guò)提高其林地枯落物和改善土壤物理性質(zhì),增加表層土壤持水效能,對(duì)恢復(fù)和改善退化柞蠶林地的生態(tài)環(huán)境、恢復(fù)森林生產(chǎn)力具有重要作用。
[Abstract]:Tussah forest is one of the most degraded forest types in the mountainous area of Liaodong. Because of repeated cutting for many years, the growth gradually declined, the regeneration ability decreased, and even the soil began to sand. The ecological functions of water conservation and soil and water conservation were obviously decreased. The results showed that the longer the fencing and restoration time, the more significant the accumulation of litter in degraded tussah forest was. The water holding capacity of litter and the ability of effective rainfall storage were improved more obviously. In the control group (without fencing, the litter storage of tussah silkworm forest was 3.69 ~ 7.92, respectively). 8.41 t / hm2 and 8.74 t / hmm2; The maximum water holding capacity is 6.23 ~ 14.71 ~ 15.81 t / hm ~ (-2) and 17.18 t / h ~ (-1) 路hm ~ (2), respectively, and the effective storage capacity is 4.78 ~ 10.87 ~ 11.70 t / h ~ (-1). 12.78 t / hmc2.There was a significant correlation between litter water holding capacity and soaking time (P 0.001). The natural logarithmic model had the best fitting effect. The improvement of hydrophysical properties of surface soil became more and more obvious with the increase of restoration time after the restoration of degenerated tussah forest. The soil bulk density of the surface layer of Antheraea pernyi forest was decreased by 5.51% 12.60% and 17.32%, respectively, and the capillary water holding capacity increased by 7.01%. The non-capillary water holding capacity increased by 46.14% and 126.19% respectively. The results of this study showed that the soil moisture retention efficiency of surface soil could be increased by increasing the litter and improving the physical properties of soil in degraded tussah forest. It plays an important role in restoring and improving ecological environment of degraded tussah forest land and restoring forest productivity.
【作者單位】： 遼寧省林業(yè)科學(xué)研究院;
【基金】：國(guó)家科技支撐計(jì)劃(2012BAD22B04) 林業(yè)公益性行業(yè)科研專項(xiàng)(201204101,201404303) 遼寧省科技計(jì)劃項(xiàng)目(2011207001) 遼寧省農(nóng)業(yè)領(lǐng)域青年科技創(chuàng)新人才培養(yǎng)計(jì)劃(2014015)
【分類號(hào)】：S714
【正文快照】： 柞蠶業(yè)是遼寧省的特色產(chǎn)業(yè),柞蠶繭、絲產(chǎn)量均占全國(guó)80%、世界70%,全省90%的柞蠶繭產(chǎn)自遼寧東部山區(qū)[1]。由于受到多年放蠶等人為干擾因素的影響,部分柞蠶林生長(zhǎng)衰退,更新能力下降,有的失去萌蘗能力,株數(shù)顯著減少,出現(xiàn)空地,導(dǎo)致涵養(yǎng)水源和保持水土的能力明顯降低,有的局部甚至，

本文編號(hào)：1392458