本文選題：消落帶 + 土壤養(yǎng)分��； 參考：《水生態(tài)學(xué)雜志》2016年03期

【摘要】：為了準(zhǔn)確揭示杉木溪消落帶土壤養(yǎng)分及其空間分布對(duì)三峽庫(kù)區(qū)水位消漲及其所帶來(lái)的環(huán)境變化的響應(yīng),2014年研究了5個(gè)完整水位消漲周期的不同海拔梯度和土層深度土壤。沿海拔梯度分別在150、155、160、165、170、175 m處各設(shè)置1個(gè)樣帶,180 m處設(shè)置1個(gè)對(duì)照樣帶,每樣帶設(shè)置5個(gè)樣方,在各樣方內(nèi)選取4個(gè)角及中心點(diǎn)共5個(gè)樣點(diǎn),用土壤采集器分別在0~5、5~10和10~15 cm土層分層采集土樣。結(jié)果表明,在水位消漲的作用下,消落帶土壤養(yǎng)分含量顯著下降,有機(jī)質(zhì)、全氮和全磷含量與非消落帶土壤相比分別減少了14.55%、20.00%和26.12%,土壤p H值則顯著增加。水位消漲還導(dǎo)致消落帶土壤養(yǎng)分隨海拔梯度呈顯著的空間變化。其中,有機(jī)質(zhì)、全氮和全鉀含量以中部消落帶土壤的含量最高,全磷含量則以中下部消落帶土壤的含量最高,而土壤p H值隨著海拔梯度的減少而增加。消落帶和非消落帶土壤養(yǎng)分在不同土層之間有著顯著差異,有機(jī)質(zhì)、全氮、全磷含量隨土壤的加深而顯著減少。在水位消漲的影響下,消落帶表層土與下層土有機(jī)質(zhì)和全氮含量的差異顯著減少,而全磷和全鉀含量的差異則有所增加。
[Abstract]:In order to accurately reveal the response of soil nutrients and their spatial distribution in the Cunninghamia lanceolata to the water level decline and its environmental changes in the three Gorges Reservoir area, the different elevation gradients and soil depth of five intact water extinction cycles were studied in 2014. A pair of stripes were set up at 150155160165170175 m each in the coastal pull gradient, and 5 samples were set up in each transect, and 4 angles and 5 central points were selected from each side. Soil samples were collected with soil collector in layers of 0 ~ 5 ~ 5 ~ 5 ~ 5 ~ 10 ~ 10 and 10 ~ 15 ~ 15 cm soil layer, respectively. The results showed that under the action of water level decrease, the soil nutrient content in the zone decreased significantly, the contents of organic matter, total nitrogen and total phosphorus decreased by 14.55% and 26.12%, respectively, and the pH value of soil increased significantly compared with the non-decaying zone soil. The decrease of water level also resulted in significant spatial variation of soil nutrients with elevation gradient. The contents of organic matter, total nitrogen and total potassium were the highest in the middle zone, and the content of total phosphorus was the highest in the middle and lower part of the zone, and the pH value of the soil increased with the decrease of the altitude gradient. There were significant differences in soil nutrients between different soil layers, and the contents of organic matter, total nitrogen and total phosphorus decreased significantly with the deepening of soil. Under the influence of water level rising, the difference of organic matter and total nitrogen content between the topsoil and the lower soil in the zone decreased significantly, while the difference between total phosphorus and total potassium content increased.
【作者單位】： 三峽地區(qū)生態(tài)保護(hù)與治理國(guó)際合作研究中心三峽大學(xué);三峽庫(kù)區(qū)生態(tài)與環(huán)境教育部工程研究中心三峽大學(xué);
【基金】：反季節(jié)消漲節(jié)律擾動(dòng)下土壤種子庫(kù)對(duì)消落帶植被生態(tài)恢復(fù)的作用機(jī)制(51379105),國(guó)家自然科學(xué)基金 三峽大學(xué)研究生科學(xué)創(chuàng)新基金(2015CX134)
【分類號(hào)】：S714

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