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The potentials of wetland restoration after farming differ between community types due to their differences in seed limit and salt tolerances in the Songnen Plain, China


編輯:2022-10-27 14:19:08

Wetlands have degraded dramatically in recent decades due to wetland drainage, agricultural reclamation, and soil salinization in China. Soil seed banks, as a way of natural regeneration, can efficiently restore the aboveground vegetation if seeds can survive after farming. To explore the response of soil seed bank to farming and consequent environmental changes, we compared the structure and composition of soil seed banks between Carex-dominated and Phragmites-dominated natural wetlands and their adjacent farmed fields in the Songnen Plain, China. We found that the responses of soil seed banks to farming and saline-alkaline stress were different between the two community types. The seed density and species richness in Carex-dominated natural wetlands were significantly higher than nearby farmed fields, however, there was no significant difference between Phragmites-dominated natural wetlands and nearby farmed fields. Carex schmidtii and Phragmites australis, dominated in natural wetlands, were both missing after farming. At the same time, the invasive species Typha angustifolia dominated in the farmed fields. Redundancy analysis identified that soil salt content was one of the major factors which significantly affected seed bank composition. Saline-alkaline stress significantly restricted the seed germination in farmed Carex fields, however, it had no significant effect in farmed Phragmites fields. Our study indicated that the potential of vegetation restoration was restricted by seed limit and soil salinization, and it differed significantly between the original community types in the Songnen Plain. In addition to hydrological connection, special technologies (such as planting and seeding) and the improvement of soil conditions are also necessary for successful restoration in salt-affected wetlands.

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聯(lián)系人:張曉平
聯(lián)系電話:0431-85542234? 85542357
Email:zhangxiaoping@neigae.ac.cn
地址:高新北區(qū)長東北高科技中心A區(qū)412室

? ? ? ?如果我們敢想,勇于接受新觀念,樂于同我們的土壤合作而不是濫用它,我們將會(huì)看到保護(hù)性農(nóng)業(yè)是引導(dǎo)我們走向前所未見的高產(chǎn)農(nóng)業(yè)的有效途徑。這不僅是為了戰(zhàn)爭時(shí)期,更是為了戰(zhàn)后的和平年代
?(Hugh?Hammond Bennett,?1943)
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聯(lián)系我們

聯(lián)系人:張曉平
聯(lián)系電話:0431-85542234? 85542357
Email:zhangxiaoping@neigae.ac.cn
地址:高新北區(qū)長東北高科技中心A區(qū)412室
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?2022 長春中科東地農(nóng)業(yè)機(jī)械裝備有限公司 備案號(hào):吉ICP備2022007635號(hào)?技術(shù)支持:龍采科技集團(tuán)