|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Biodegradation of nicosulfuron by a novel Alcaligenes faecalis strain ZWS11显示文摘A bacterial strain ZWS11 was isolated from sulfonylurea herbicide-contaminated farmland soil and identified as a potential nicosulfuron-degrading bacterium. Based on morphological and physicochemical characterization of the bacterium and phylogenetic analysis of the 16 S r RNA sequence, strain ZWS11 was identified as Alcaligenes faecalis. The effects of the initial concentration of nicosulfuron, inoculation volume, and medium p H on degradation of nicosulfuron were investigated. Strain ZWS11 could degrade 80.56% of the initial nicosulfuron supplemented at 500.0 mg/L under the conditions of p H 7.0, 180 r/min and30°C after incubation for 6 days. Strain ZWS11 was also capable of degrading rimsulfuron,tribenuron-methyl and thifensulfuron-methyl. Four metabolites from biodegradation of nicosulfuron were identified, which were 2-aminosulfonyl-N, N-dimethylnicotinamide(M1), 4, 6-dihydroxypyrimidine(M2), 2-amino-4, 6-dimethoxypyrimidine(M3) and2-(1-(4,6-dimethoxy-pyrimidin-2-yl)-ureido)-N,N-dimethyl-nicotinamide(M4). Among the metabolites detected, M2 was reported for the first time. Possible biodegradation pathways of nicosulfuron by strain ZWS11 were proposed. The degradation proceeded mainly via cleavage of the sulfonylurea bridge, O-dealkylation, and contraction of the sulfonylurea bridge by elimination of a sulfur dioxide group. The results provide valuable information for degradation of nicosulfuron in contaminated environments. | Weisong Zhao Chen Wang Li Xu Chunqing Zhao Hongwu Liang Lihong Qiu | 2015 | Journal of Environmental Sciences2015，27，9： | 9 |
| 2 | Effects of Different Substrate Composition on Growth of Gesneriaceae Plants显示文摘The cultivation experiment was carried out to investigate the effects of different proportions of peat soil, perlite, vermiculite and yellow mud on growth of Gesneriaceae species(Chirita gueilinensis, Sinningia speciosa, Lysionotus pauciflorus, Hemiboea henryi, Aeschynanthus acuminatus, Saintpaulia ionantha). The growth traits of each plant growing in 7 different matrix materials were investigated.The plant height, crown width and chlorophyll content of each plant were measured. The results showed that the best substrate ratio was peat soil∶vermiculite=2∶1for C. gueilinensis, L. pauciflorus and H. henryi; peat soil∶perlite∶vermiculite = 2∶1∶1for S. ionantha; peat soil∶vermiculite∶yellow mud=2∶1∶1 for S. speciosa; peat soil∶perlite∶vermiculite∶yellow mud=2∶1∶1∶1 for A. acuminatus. | Zhijing QIU Chunqing ZOU Zhengjun SHI Yaoliang DAI Ruixing XIE | 2014 | Agricultural Science & Technology2014，15，8： | 0 |
| 3 | Extracting Lotus Fields Using the Spectral Characteristics of GF-1 Satellite Data显示文摘The lotus(Nelumbo nucifera Gaertn.)is an aquatic plant that grows in shallow water and has long been cultivated in South China.It can improve the incomes of farmers and plays an important role in alleviating poverty in rural China.However,a modern method is required to accurately estimate the area of lotus fields.Lotus has spectral characteristics similar to those of rice,grassland,and shrubs.The features surrounding areas where it is grown are complex,small,and fragmented.Few studies have examined the remote sensing extraction of lotus fields,and automatic extraction and mapping are still challenging methods.Here,we compared the spectral characteristics of lotus fields and other ground objects and devised a remote sensing method for the rapid extraction of lotus fields.Using this method,the extraction accuracy of lotus was 96.3%.The Kappa coefficient was 0.926,which is higher than those of the unsupervised K-means classification,Mahalanobis distance,and support vector machine supervised classification,and demonstrates the potential of this method for extracting and mapping lotus fields by remote sensing. | Dongping Zha Haisheng Cai Xueling Zhang Qinggang He Liting Chen Chunqing Qiu Shufang Xia | 2022 | Phyton-International Journal of Experimental Botany2022，91，10： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员