淹水发生与持续时间对退化盐碱沼泽芦苇生长及土壤理化性质的影响
发布时间：2018-12-23 11:22
【摘要】：比较了不同淹水发生时间与持续时间对退化盐沼芦苇生长生理以及盐碱土壤理化性质的影响。结果表明,随着淹水持续时间的增加,芦苇株高显著增加,长期淹水条件下芦苇株高最高(FD_5),但地上和地下生物量呈先增加后下降趋势,淹水持续2月(FD_3)的生物量最高,Na~+,K~+浓度虽然不规则变化,但最低浓度值出现在FD_3处理中。另外,盐碱土壤理化指标(pH值,EC,Na~+,Ca~(2+),HCO_3~-和CO_3~(2-)含量)随着淹水持续时间的增加呈先降低后上升趋势,土壤理化性质最优的处理为FD_3。随着淹水发生时间的后移,芦苇的株高和地上生物量不变,地下生物量呈先增加后下降趋势,Na~+含量呈先下降后上升趋势,芦苇地上器官的K~+含量以及盐碱土壤的pH值,EC,Na~+,Ca~(2+),HCO_3~-和CO_3~(2-)含量表现为生长初期淹水低于生长后期淹水处理(FO_1,FO_2优于FO_3,FO_4)。无论淹水发生时间还是淹水持续时间均对土壤的有机质,K~+,Mg~(2+),Cl~-,SO_4~(2-)含量没有显著影响。因此,6月,7月份是芦苇生态需水期,在此阶段补充充足水分对芦苇的生长恢复具有显著意义,并能改善盐碱土壤的理化性质。
[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.
【作者单位】： 中国科学院东北地理与农业生态研究所中国科学院湿地生态与环境重点实验室;东北林业大学盐碱地生物资源环境研究中心东北油田盐碱植被恢复与重建教育部重点实验室;吉林建筑大学松辽流域水环境教育部重点实验室;
【基金】：国家重大科学研究计划项目(2012CB956100) 国家自然科学资助项目(31100403) 吉林省科技发展计划项目(20130102036JC)
【分类号】：S564.2;S156.4
本文编号：2389920
[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.
【作者单位】： 中国科学院东北地理与农业生态研究所中国科学院湿地生态与环境重点实验室;东北林业大学盐碱地生物资源环境研究中心东北油田盐碱植被恢复与重建教育部重点实验室;吉林建筑大学松辽流域水环境教育部重点实验室;
【基金】：国家重大科学研究计划项目(2012CB956100) 国家自然科学资助项目(31100403) 吉林省科技发展计划项目(20130102036JC)
【分类号】：S564.2;S156.4
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1 苏玲;水稻土淹水过程中铁化学行为变化对磷有效性影响研究[D];浙江大学;2001年
2 殷士学;淹水土壤中硝态氮异化还原成铵过程的研究[D];南京农业大学;2000年
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