【摘要】：比較了不同淹水發(fā)生時(shí)間與持續(xù)時(shí)間對(duì)退化鹽沼蘆葦生長(zhǎng)生理以及鹽堿土壤理化性質(zhì)的影響。結(jié)果表明,隨著淹水持續(xù)時(shí)間的增加,蘆葦株高顯著增加,長(zhǎng)期淹水條件下蘆葦株高最高(FD_5),但地上和地下生物量呈先增加后下降趨勢(shì),淹水持續(xù)2月(FD_3)的生物量最高,Na~+,K~+濃度雖然不規(guī)則變化,但最低濃度值出現(xiàn)在FD_3處理中。另外,鹽堿土壤理化指標(biāo)(pH值,EC,Na~+,Ca~(2+),HCO_3~-和CO_3~(2-)含量)隨著淹水持續(xù)時(shí)間的增加呈先降低后上升趨勢(shì),土壤理化性質(zhì)最優(yōu)的處理為FD_3。隨著淹水發(fā)生時(shí)間的后移,蘆葦?shù)闹旮吆偷厣仙锪坎蛔?地下生物量呈先增加后下降趨勢(shì),Na~+含量呈先下降后上升趨勢(shì),蘆葦?shù)厣掀鞴俚腒~+含量以及鹽堿土壤的pH值,EC,Na~+,Ca~(2+),HCO_3~-和CO_3~(2-)含量表現(xiàn)為生長(zhǎng)初期淹水低于生長(zhǎng)后期淹水處理(FO_1,FO_2優(yōu)于FO_3,FO_4)。無(wú)論淹水發(fā)生時(shí)間還是淹水持續(xù)時(shí)間均對(duì)土壤的有機(jī)質(zhì),K~+,Mg~(2+),Cl~-,SO_4~(2-)含量沒(méi)有顯著影響。因此,6月,7月份是蘆葦生態(tài)需水期,在此階段補(bǔ)充充足水分對(duì)蘆葦?shù)纳L(zhǎng)恢復(fù)具有顯著意義,并能改善鹽堿土壤的理化性質(zhì)。
[Abstract]:The effects of different flooding time and duration on growth physiology and physical and chemical properties of degraded salt marsh Reed were compared. The results showed that the plant height of Reed increased significantly with the increase of the duration of flooding, and the highest plant height (FD_5) was observed under long-term flooding, but the aboveground and underground biomass increased first and then decreased. The biomass of flooding lasted for 2 months (FD_3) was the highest, Na~ and K ~ concentration changed irregularly, but the lowest concentration appeared in FD_3 treatment. In addition, the physicochemical indexes (pH, EC,Na~, Ca~ (2), HCO_3~- and CO_3~ (2-) of saline-alkali soil decreased first and then increased with the increase of flooding duration. The best treatment of soil physical and chemical properties was FD_3.. The plant height and aboveground biomass of Reed remained unchanged, and the underground biomass increased first and then decreased, and the content of Na~ decreased first and then increased. The K ~ content of the aboveground organs of Reed and pH value of saline-alkali soil, EC, increased with the time of flooding. The contents of Na~, Ca~ (2), HCO_3~- and CO_3~ (2-) were lower in the early growth stage than in the latter stage (FO_1,FO_2 was better than FO_3,FO_4). The soil organic matter, K ~, Mg~ (2) and Cl~-,SO_4~ (2-) contents were not significantly affected by the time of flooding or the duration of flooding. Therefore, June and July are the ecological water demand period of Reed, which is significant for the growth and recovery of Reed, and can improve the physical and chemical properties of saline-alkali soil.
【作者單位】： 中國(guó)科學(xué)院東北地理與農(nóng)業(yè)生態(tài)研究所中國(guó)科學(xué)院濕地生態(tài)與環(huán)境重點(diǎn)實(shí)驗(yàn)室;東北林業(yè)大學(xué)鹽堿地生物資源環(huán)境研究中心東北油田鹽堿植被恢復(fù)與重建教育部重點(diǎn)實(shí)驗(yàn)室;吉林建筑大學(xué)松遼流域水環(huán)境教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重大科學(xué)研究計(jì)劃項(xiàng)目(2012CB956100) 國(guó)家自然科學(xué)資助項(xiàng)目(31100403) 吉林省科技發(fā)展計(jì)劃項(xiàng)目(20130102036JC)
【分類號(hào)】：S564.2;S156.4

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1 蘇玲;水稻土淹水過(guò)程中鐵化學(xué)行為變化對(duì)磷有效性影響研究[D];浙江大學(xué);2001年

2 殷士學(xué);淹水土壤中硝態(tài)氮異化還原成銨過(guò)程的研究[D];南京農(nóng)業(yè)大學(xué);2000年

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