In this study,an analysis of organic fertilizer of an agro-waste(Sesame straw)plus cow dung was carried out using an epigeic earthworm species Eisenia fetida and Perionyx sansibaricus.Sesame straw is abundantly produc...In this study,an analysis of organic fertilizer of an agro-waste(Sesame straw)plus cow dung was carried out using an epigeic earthworm species Eisenia fetida and Perionyx sansibaricus.Sesame straw is abundantly produced after each harvesting of the crop in Kharif season in arid region of tropical India.The compost produced in presence and absence of earthworm exhibit significant(P<0.001)and non-significant(P>0.05)changes in physicochemical properties respectively.In control bedding,the values of water holding capacity enhanced significantly(P<0.05)by 1.28 fold,while organic carbon and C/N ratio decreased significantly(P<0.05)by 19.93%and 31.25%respectively after 60 days of composting.Working of E.fetida in the bedding material showed significant(P<0.001)difference in the level of pH,electrical conductivity,water holding capacity,organic carbon,total nitrogen,C/N ratio,available phosphorous and available potassium.After 60 days of working of P.sansibaricus,these physicochemical properties of the bedding substrate also changed significantly(P<0.001).Analysis of vermibed showed a gradual increase in electrical conductivity,water holding capacity,total nitrogen,available phosphorus and available potassium by 1.51,1.86,1.95,1.78 and 1.75 fold respectively.While the values of pH,organic carbon and C/N ratio declined by 9.30%,41.80%and 71.48%respectively within 60 days of decomposition.Thus,E.fetida and P.sansibaricus can be applied for production of organic fertilizer of sesame chaff plus cow dung to fulfill the requirement of bio-fertilizers for organic farming and agro-waste management in arid environment.展开更多
The purpose of this paper was to study the effects of different C/N ratios on the maturity and microbial quantity of com-posting with sesame meal and rice straw biochar.Rice straw was calcined into biochar as raw mate...The purpose of this paper was to study the effects of different C/N ratios on the maturity and microbial quantity of com-posting with sesame meal and rice straw biochar.Rice straw was calcined into biochar as raw materials composting with sesame meal for 30 days,referring to Chenfu Agricultural Book in Sōuthern Song Dynasty(1127-1279 A.D.).Sesame meal was used to adjust the C/N ratio of compost,and three treatments were designed in the experiment,which were C/N ratios of 15,20 and 30,respectively.The results showed that C/N ratio of 20 was beneficial for promoting the temperature rise,the removal of water,the degradation of organic carbon,and the decrease of microbial quantity.The C/N ratio of 20 was beneficial to the compost maturity(T value was 0.47,final GI was 99.67%).The results of Pearson correlation analysis showed that C/N ratio was positively correlated with moisture content,total organic carbon and negatively correlated with germination index,indicating that high C/N ratio was beneficial to water removal and total organic carbon degradation.Therefore,we suggest that the suitable C/N ratio of rice straw biochar and sesame meal is 20.At the same time,we have proved that the composting method in Southern Song Dynasty is feasible,which is of great significance to understand the development of composting in China.展开更多
文摘In this study,an analysis of organic fertilizer of an agro-waste(Sesame straw)plus cow dung was carried out using an epigeic earthworm species Eisenia fetida and Perionyx sansibaricus.Sesame straw is abundantly produced after each harvesting of the crop in Kharif season in arid region of tropical India.The compost produced in presence and absence of earthworm exhibit significant(P<0.001)and non-significant(P>0.05)changes in physicochemical properties respectively.In control bedding,the values of water holding capacity enhanced significantly(P<0.05)by 1.28 fold,while organic carbon and C/N ratio decreased significantly(P<0.05)by 19.93%and 31.25%respectively after 60 days of composting.Working of E.fetida in the bedding material showed significant(P<0.001)difference in the level of pH,electrical conductivity,water holding capacity,organic carbon,total nitrogen,C/N ratio,available phosphorous and available potassium.After 60 days of working of P.sansibaricus,these physicochemical properties of the bedding substrate also changed significantly(P<0.001).Analysis of vermibed showed a gradual increase in electrical conductivity,water holding capacity,total nitrogen,available phosphorus and available potassium by 1.51,1.86,1.95,1.78 and 1.75 fold respectively.While the values of pH,organic carbon and C/N ratio declined by 9.30%,41.80%and 71.48%respectively within 60 days of decomposition.Thus,E.fetida and P.sansibaricus can be applied for production of organic fertilizer of sesame chaff plus cow dung to fulfill the requirement of bio-fertilizers for organic farming and agro-waste management in arid environment.
基金The project was financially supported by the National key research and development plan“The technology of agricultural waste composting and the research of integrated equipment for composting”(2016YFD0800600).
文摘The purpose of this paper was to study the effects of different C/N ratios on the maturity and microbial quantity of com-posting with sesame meal and rice straw biochar.Rice straw was calcined into biochar as raw materials composting with sesame meal for 30 days,referring to Chenfu Agricultural Book in Sōuthern Song Dynasty(1127-1279 A.D.).Sesame meal was used to adjust the C/N ratio of compost,and three treatments were designed in the experiment,which were C/N ratios of 15,20 and 30,respectively.The results showed that C/N ratio of 20 was beneficial for promoting the temperature rise,the removal of water,the degradation of organic carbon,and the decrease of microbial quantity.The C/N ratio of 20 was beneficial to the compost maturity(T value was 0.47,final GI was 99.67%).The results of Pearson correlation analysis showed that C/N ratio was positively correlated with moisture content,total organic carbon and negatively correlated with germination index,indicating that high C/N ratio was beneficial to water removal and total organic carbon degradation.Therefore,we suggest that the suitable C/N ratio of rice straw biochar and sesame meal is 20.At the same time,we have proved that the composting method in Southern Song Dynasty is feasible,which is of great significance to understand the development of composting in China.
