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Université du Xinjiang (2019)

Effects of Biochar on Moss Crust and Soil

玛丽娅·奴尔兰;

Titre : Effects of Biochar on Moss Crust and Soil

Auteur : 玛丽娅·奴尔兰;

Grade : Master’s Theses 2019

Université : Université du Xinjiang

Résumé partiel
Under the global changes,the surface environment of desert ecosystems has deteriorated drastically.As an important part of the desert ecosystem,moss crust plays an extremely important role in resisting soil water erosion and accelerating nutrient cycling.Biochar as a soil amendment can increase soil water holding capacity and nutrient use efficiency.Therefore,the application of biochar to moss crust is of great significance for the restoration of desert ecosystems.In this study,the mossy crusts and the soils covered by the southern margin of the Gurbantunggut Desert were studied.The two methods of addition(1-the biochar were evenly sprinkled on the surface of the crust,2-the organism)The carbon and the soil under the skin were uniformly mixed.The CK,T1,T2 and T3 gradients of Artemisia sphaeroides and rice husk biochar were added to explore the response of mossy crust to biochar addition.The results are as follows :(1)With the addition of rice husk Biocharcoal and Artemisia deserticola biocharcoal,the moisture content of moss crust and soil increased with the increase of the addition amount,and showed the same trend with the growth season.The moisture content of moss crust was higher than that of soil.In the first way,the water-holding capacity of moss crust with Artemisia sphaerocephala biochar was better than that with rice husk biochar.The second way is adding Artemisia sphaerocephala biocharcoal,which has higher soil water content.(2)With the addition of biochar,the C,N and P contents of bryophyte crust were significantly different from those of the control,and increased with the increase of biochar addition.The content of C,N and P in the crust of Artemisia sphaerocephala was higher than that of rice husk biochar in the first way,but there was no significant difference in the second way.The contents of C,N and P in the crusts of two kinds of Biocharcoal bryophytes were6.4-76.8g/kg,0.04-0.36g/kg and 0.23-0.99g/kg,respectively.C:N,C:P and N:P were61.9-526.0,22.4-138.5 and 0.11-0.92,respectively,indicating that the growth of moss crusts would be stimulated by biochar when the dosage increased.(3)When rice husk biochar and Artemisia deserticola biochar were added,the total C content of soil increased with the gradient of biochar addition,and the difference was significant ;when two kinds of biochar were added in the second way,the C content of soil was higher than that in the first way,and the difference was significant.With the addition of biochar,soil N content increased with the gradient of biochar addition,showing a"V"trend with the month,and peaked in June and October.Adding different gradient content of rice husk biochar,soil P content was higher than blank,but there was no significant difference between them

Mots clés : moss crust; biochar; soil nitrogen mineralization; correlation;

Présentation (CNKI)

Page publiée le 21 mai 2020