The vegetation restoration experiment was carried out by selecting the arbor-shrub-grass plants with strong stress resistances in the drawdown area of the reservoir of Chongqing Bashan Lake National Wetland Park.The r...The vegetation restoration experiment was carried out by selecting the arbor-shrub-grass plants with strong stress resistances in the drawdown area of the reservoir of Chongqing Bashan Lake National Wetland Park.The results showed that the survival rate of Taxodium distichum was only 33% in August since the completion of the planting in May 2017,while the survival rates of other plant species were all 100%.After the rising and falling of water levels from September 2017 to February 2018,the investigations conducted in April 2018 showed that the flooding lasted for 130 d at the altitude of 668-672 m,where the preserving rate of Betula nigra was very low of only 25%.The flooding lasted for 120 d at the altitude of 672-675 m,where B.nigra,Pontederia cordata,and Thalia dealbata showed good preserving conditions with the preserving rates over 55%,while Canna indica,Cyperus alternifolius and Iris tectorum had poor preserving conditions with the rates below 50%.The drawdown area with the altitude of 675-678 m had the flooding lasted for 84 d,and good preserving conditions were found in B.nigra,T.distichum,Pterocarya stenoptera,Distylium chinense,Rosa multiflora,P.cordata,T.dealbata and Iris tectorum,which had the preserving rates reach up to 65%,and the preserving rate of B.nigra was as high as 76.2%,but the preserving rates of C.indica and C.alternifolius were low.展开更多
The tests of raising seedlings of Moringa oleifera were carried out in autumn and spring in Chongqing.The results showed that in the case of container seedling raising,the seedling emergence rate in autumn was 90%.Due...The tests of raising seedlings of Moringa oleifera were carried out in autumn and spring in Chongqing.The results showed that in the case of container seedling raising,the seedling emergence rate in autumn was 90%.Due to the large humidity and extreme weather,and the limited management conditions such as ventilation,the seedlings suffered from serious diseases,and the preservation rate was only 30%.The emergence rate was 91% in the spring of 2017,and the seedlings had unanimous growth.However,the seedling preservation rate dropped to 75% due to hail.In the spring of 2018,the emergence rate was 93%,and the seedlings also had unanimous growth.By the end of May,the seedlings had grown to 15 cm high.In addition,in the field seedling raising in 2017 and 2018,the seedlings showed unanimous growth with the emergence rate of 88% and 90%,respectively,and the seedlings grew into 30 cm high with good growth conditions in May.展开更多
基金Supported by the Science and Technology Planning Project of Bashan Lake National Wetland Park Management Center of Chengkou County,China
文摘The vegetation restoration experiment was carried out by selecting the arbor-shrub-grass plants with strong stress resistances in the drawdown area of the reservoir of Chongqing Bashan Lake National Wetland Park.The results showed that the survival rate of Taxodium distichum was only 33% in August since the completion of the planting in May 2017,while the survival rates of other plant species were all 100%.After the rising and falling of water levels from September 2017 to February 2018,the investigations conducted in April 2018 showed that the flooding lasted for 130 d at the altitude of 668-672 m,where the preserving rate of Betula nigra was very low of only 25%.The flooding lasted for 120 d at the altitude of 672-675 m,where B.nigra,Pontederia cordata,and Thalia dealbata showed good preserving conditions with the preserving rates over 55%,while Canna indica,Cyperus alternifolius and Iris tectorum had poor preserving conditions with the rates below 50%.The drawdown area with the altitude of 675-678 m had the flooding lasted for 84 d,and good preserving conditions were found in B.nigra,T.distichum,Pterocarya stenoptera,Distylium chinense,Rosa multiflora,P.cordata,T.dealbata and Iris tectorum,which had the preserving rates reach up to 65%,and the preserving rate of B.nigra was as high as 76.2%,but the preserving rates of C.indica and C.alternifolius were low.
基金Supported by the Special Project for Social Livelihood and Technological Innovation of Chongqing Municipality,China(cstc2016shmszx80124)
文摘The tests of raising seedlings of Moringa oleifera were carried out in autumn and spring in Chongqing.The results showed that in the case of container seedling raising,the seedling emergence rate in autumn was 90%.Due to the large humidity and extreme weather,and the limited management conditions such as ventilation,the seedlings suffered from serious diseases,and the preservation rate was only 30%.The emergence rate was 91% in the spring of 2017,and the seedlings had unanimous growth.However,the seedling preservation rate dropped to 75% due to hail.In the spring of 2018,the emergence rate was 93%,and the seedlings also had unanimous growth.By the end of May,the seedlings had grown to 15 cm high.In addition,in the field seedling raising in 2017 and 2018,the seedlings showed unanimous growth with the emergence rate of 88% and 90%,respectively,and the seedlings grew into 30 cm high with good growth conditions in May.
