Artificial Measures to Promote Natural Regeneration in Different Habitat Types of Larix principis rupprechtii Forest
[Objective]To study the effects of artificial promotion of natural regeneration measures in different habitat types of North China larch plantations,develop advanced and feasible artificial promotion of natural regeneration technologies,and provide technical support for im-proving the natural regeneration capacity and stand quality of Larix principis-rupprechtiih plantations.[Method]In Guyuan City,Ningxia,five forest farms were selected as experimental points along the main vein of Liupan Mountain in different directions.A total of 20 artificial and nat-ural regeneration plots of 12 m×12 m size were established for different habitat types(nine within the forest,six in the forest gap,and five at the forest edge).Each sample was manually sown seeds in the autumn of 2021(October)and spring of 2022(May);six surface treatment measures were deployed at each experimental site(A-control,B-trenching,C-hole digging,D-random small hole density points,E-rough plo-wing,and F-fine land preparation),with each treatment repeated three times.Based on monitoring data from two consecutive years,analyze and determine the main factors affecting natural renewal,and propose measures to promote natural renewal through artificial means.[Result]In terms of the conservation density of each treatment measure for two consecutive years,under autumn sowing conditions in the forest habitat,the order is F(3.1plants/m2)＞E(2.8plants/m2)＞B(2.1plants/m2)＞C(1.8plants/m2)＞D(1.1plants/m2)＞CK(0.8 plants/m2).Under spring sowing conditions,the order is F(6.4 plants/m2)＞E(5.8 plants/m2)＞B(5.1 plants/m2)＞C(3.0 plants/m2)＞D(2.0 plants/m2)＞A(1.8 plants/m2).Un-der autumn sowing conditions in the forest gap habitat,the order is E(12.6 plants/m2)＞CK(8.7 plants/m2)＞B(8.1 plants/m2)＞C(8.0 plants/m2)＞F(7.7 plants/m2)＞D(6.3 plants/m2);in spring sowing,the order is E(13.9 plants/m2)＞F(12.4 plants/m2)＞B(8.9 plants/m2)＞CK(8.2 plants/m2)＞D(7.0 plants/m2)＞C(6.5 plants/m2).Under the autumn sowing conditions in the forest edge habitat,the order is C(1.9 plants/m2)＞B(1.8 plants/m2)＞E(1.4 plants/m2)＞F(1.1 plants/m2)＞CK(0.6 plants/m2)＞D(0.3 plants/m2).In spring sowing,the order is CK(1.6 plants/m2)＞B(1.4 plants/m2)＞E(1.0 plants/m2)＞F(1.0 plants/m2)＞C,D(0.5 plants/m2).[Conclusion]Overall,among the three types of habitats,the highest seedling preservation density is in the forest gap,followed by within the forest and at the forest edge.In the sowing season,the emergence and preservation density of the three types of habitats are better in spring sowing than in autumn sowing.In surface treatment measures,whether it is autumn or spring sowing,the preservation density of the forest,habitat is better with E and F.E and B are bet-ter with forest gap habitat,and F,E and B are better with forest edge habitat.
Larix principis-rupprechtiiArtificial promotion of natural renewal measuresLiupan Mountain
万方数据
维普
