科尔沁沙地藓类结皮人工培育技术

Study on artificial cultivation of moss crust in Horqin sandy land

摘要:

【目的】 探究科尔沁沙地藓类结皮的关键影响因子及最优组合，为该区域大范围结皮生态修复提供理论支撑。【方法】 通过正交试验设计，考虑接种量、凋落物种类、沙质土量、加水间隔时间、透光率、种植添加方式6个因素，分析藓类结皮盖度、株高和结皮层干重对不同因素的响应。【结果】 1）接种量、凋落物种类、沙质土量、加水间隔时间、透光率、种植添加方式对藓类结皮盖度、株高和结皮层干重均有显著影响（P＜0.05），不同因素对各指标的影响程度不同；2） 在接种量150 g、有机肥15 g、沙质土 250 g、加水间隔时间5 d、透光率70%、种植添加方式（上层种子土中间凋落物下层沙质土）条件下盖度最大，为96%，在接种量90 g、有机肥15 g、沙质土0 g、加水间隔时间5 d、透光率70%、种植添加方式 （上层种子土中间沙质土下层凋落物）条件下株高最大，为3.38 mm，在接种量150 g、生物炭15 g、沙质土100 g、加水间隔时间5 d、透光率40%、种植添加方式（混合添加）条件下结皮层干重最大，为 0. 69 g/cm2，显著大于其他处理。【结论】 因盖度可直接反应藓类结皮生长状况，科尔沁沙地藓类结皮快速培育最优组合为接种量150 g、有机肥15 g、沙质土250 g、加水间隔时间5 d、透光率70%、上层种子土中间凋落物下层沙质土，温室培育50 d，藓类结皮盖度可达到85%。

Abstract:

【Objective】 The purpose of the study is to explore the key influencing factors and optimal combinations of moss crust in Horqin sandy land，and to provide theoretical support for ecological restoration of large-scale crust crust in this area.【Method】 Through orthogonal experiment design，considering 6 factors，such as inoculation amount，litter species，sandy soil amount，water addition interval，light transmittance and planting addition method，the response of moss crust coverage，plant height and dry weight to different factors was analyzed.【Result】 1） Inoculation amount，litter species，sandy soil amount，water addition interval，light transmittance and planting method had significant effects on the cover，plant height and dry weight of moss crust （P＜0. 05），and different factors had different effects on each index. 2） In terms of coverage，the maximum was 96% under the conditions of inoculation amount of 150 g，organic fertilizer 15 g，sandy soil 250 g，water addition interval of 5 days，light transmittance of 70%，and planting addition method （upper seed soil in the middle of litter and lower sandy soil）. Under the conditions of inoculation amount of 90 g，organic fertilizer 15 g，sandy soil 0 g，water addition interval of 5 days，light transmission of 70%， planting addition method （between the upper seed soil and the litter of the lower sandy soil），the maximum was 3. 38 mm. In terms of dry weight of the layer，The maximum inoculation amount of 150 g，biochar 15 g，sandy soil 100 g， water addition interval of 5 days，light transmission of 40%，and planting addition method （mixed addition） condition was 0. 69 g/cm2，which was significantly higher than that of other treatments.【Conclusion】 Because the coverage could directly reflect the growth status of moss crust，the optimal combination for rapid cultivation of moss crust in Horqin sandy land was 150 g inoculation amount，15 g organic fertilizer，250 g sandy soil，5 d water addition interval， light transmittance of 70%，upper seed soil，middle litter and lower sandy soil，and 50 d greenhouse cultivation，the coverage of moss crust could reach 85%.