针对科尔沁沙地沙漠化和农牧业生产中的重大生态和经济问题，利用微生物定向培育技术，选择土壤和牛粪混合的菌源母质筛选出具有较强分解能力的纤维素分解菌群（NMCel）；将玉米秸秆和牲畜粪便按照5∶3（干重比）的比例混合，加入稀释后的NMCel菌液进行有氧发酵，发酵60d后制备成具有一定保水性、透气性和粘性的有机混合物。这种有机混合物对裸沙的修复能力较好，可以显著提高裸沙地表土壤碳氮含量和促进裸沙地表生物结皮的形成。有机混合物的最佳播撒方式是：在裸沙表面播施差不嘎蒿（Artemisia halodendron）、胡枝子（Lespedeza davurica）、狗尾草（Setaria viridis）等固沙植物种子后播撒1kg·5m-2有机混合物，然后覆盖遮阴网。有机混合物的播撒使沙丘裸露创面的植被盖度从6%增加到26%，保水性提高24%~47%，抗风蚀能力提高了5.4~8.6倍。
Our study focused on the ecological and economical issue that caused by desertification and farming production in Horqin Sandy Land. We use microbial cultivation technique to screen efficient cellulose decomposing microbial flora (NMCel) from the matrix of sand soils and cattle dung. Maize straw and cattle dung (the dry weight ratio is 5∶3) were used to produce organic compound, adding diluted NMCel to accelerate the compound decomposition rate. The organic compound had a good potency of water holding capacity, air permeability, and viscosity after 60 days fermentation. The organic compound was very efficient to rehabilitate bare sand dunes, and it can increase surface soil organic carbon and total nitrogen, and accelerate biological soil crust formation. Take cost and ecological effects in consideration, we optimized the dune restoration method: put the organic compound (1 kg·5m-2) on the bare sand dunes after sowing the seeds of Artemisia halodendron, Lespedeza davurica,Setaria viridis and so like sand-fixing plants, and then cover the organic compound by shadow nets. The field experiment showed that the optimized method increased vegetation coverage from 6% to 26%, improved soil water hold capacity by 24%-47%, and enhanced wind erosion resistance ability by 5.4-8.6 times compared with natural restoration.
[1] 赵哈林,赵学勇,张铜会.科尔沁沙地沙漠化过程及其恢复机理[M].北京:海洋出版社,2003.
[2] Zhao X Y,Wang S K,Luo Y Y,et al.Toward sustainable desertification reversion:a case study in Horqin Sandy Land of northern China[J].Sciences in Cold and Arid Regions,2015,7(1):23-28.
[3] 朱震达,刘恕,邸醒民.中国的沙漠化及其治理[M].北京:科学出版社,1989.
[4] 王涛.中国沙漠与沙漠化[M].石家庄:河北科学技术出版社,2003.
[5] 袁立敏,高永,黄海广,等.生物模块沙障对流动沙丘土壤微生物分布的影响[J].中国沙漠,2015,35(1):189-194.
[6] 刘春艳,侯辉,宋文有,等.通辽市科尔沁区玉米生产现状及发展对策[J].现代农业科技,2011(6):374.
[7] 周亚星,周伟.通辽市玉米生产现状及发展策略[J].内蒙古农业科技,2014(1):8-9.
[8] 陈晓彩,修宗敏,孟根其木格.通辽市草原畜牧业发展的现状与对策[J].内蒙古民族大学学报,2007,13(5):48-49.
[9] 内蒙古统计局.内蒙古统计年鉴[M].北京:中国统计出版社,2013.
[10] 崔宗均,李美丹,朴哲.一组高效稳定纤维素分解菌复合系MC1的筛选及功能[J].环境科学,2002,23(3):36-39.
[11] 王得武,姚拓,杨巧丽,等.高效稳定纤维素分解菌群筛选及其分解特性研究[J].草业学报,2014,23(2):253-259.
[12] 鲍士旦.土壤农化分析[M].北京:中国农业出版社,2000.
[13] 刘新平,张铜会,赵哈林,等.流动沙丘降雨入渗和再分配过程[J].水利学报,2006,37(2):166-171.
[14] Gupta J P,Aggarwal R K,Raikhy N P.Soil erosion by wind from bare sandy plains in western Rajasthan,India[J].Journal of Arid Environments,1981,4(1):15-20.
[15] 戴海伦,金复鑫,张科利.国内外风蚀监测方法回顾与评述[J].地球科学进展,2011,26(4):401-408.
[16] Štursová M,Žicáková L,Leigh M B,et al.Cellulose utilization in forest litter and soil:identification of bacterial and fungal decomposers[J].Fems Microbiology Ecology,2012,80(3):735-746.
[17] 芦光新,陈秀蓉,杨成德,等.一株纤维素分解菌的鉴定及对两种草坪草凋落物分解活性的研究[J].草业学报,2011,20(6):170-179.
[18] 甄静,王继雯,谢宝恩,等.一株纤维素降解真菌的筛选、鉴定及酶学性质分析[J].微生物学通报,2011,38(5):709-714.
[19] Wang S K,Zhao X Y,Zuo X A,et al.Screening of cellulose decomposing fungi in sandy dune soil of Horqin Sandy Land[J].Sciences in Cold and Arid Regions,2015,7(1):74-80.
[20] 唐蕊.土壤中纤维素分解菌的分离与鉴定研究[J].北方园艺,2011,13:41-42.
[21] 樊程,李双江,李成磊,等.大熊猫肠道纤维素分解菌的分离鉴定及产酶性质[J].微生物学报,2012,52(9):1113-1121.
[22] 牛俊玲,李国学,崔宗均,等.堆肥中高效降解纤维素林丹复合菌系的构建及功能[J].环境科学,2005,26(4):186-190.
[23] 周明吉,周玉生,孙加亮,等.我国固沙材料研究及应用现状[J].材料导报,2012,26(2):332-334.
[24] 严亮,杨久俊.新型化学固沙材料的研究现状及其展望[J].材料导报,2009,23(3):51-54
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