[Objective] The aim was to research influential factors of water productivity of maize in oasis in arid areas. [Method] In middle reach of Heihe River in Linze County of Zhangye City, maize, a major crop in irrigated ...[Objective] The aim was to research influential factors of water productivity of maize in oasis in arid areas. [Method] In middle reach of Heihe River in Linze County of Zhangye City, maize, a major crop in irrigated area in the oasis, was studied and nine influential factors were chosen through grey relation analysis. [Result] According to grey relation analysis, top five factors influencing water produc- tivity of maize during 1995-2009 were as follows： applied quantity of chemical fertil- izers〉labour input〉seeds〉mulch amount〉pesticide amount, which indicated that controllable factors, instead of uncontrollable ones, dominate in influence of water productivity of maize in oasis in arid areas. [Conclusion] With water resource limited, investment of controllable factors in high-efficient agricultural production should be the major strategy to improve water productivity of maize in oasis of arid areas.展开更多
A simple, easily-operated and economical carbonization technology with Eupatorium adenophorum was introduced in terms of instrument selection, carboniza- tion of Eupatorium adenophorum and preparation of carbon rod, a...A simple, easily-operated and economical carbonization technology with Eupatorium adenophorum was introduced in terms of instrument selection, carboniza- tion of Eupatorium adenophorum and preparation of carbon rod, and evaluation was made on economic profits from carbonization of Eupatorium adenophorum.展开更多
There is a variety of nice results about strongly Gorenstein flat modules over coherent rings. These results are done by Ding, Lie and Mao. The aim of this paper is to generalize some of these results, and to give hom...There is a variety of nice results about strongly Gorenstein flat modules over coherent rings. These results are done by Ding, Lie and Mao. The aim of this paper is to generalize some of these results, and to give homological descriptions of the strongly Gorenstein flat dimension (of modules and rings) over arbitrary associative rings.展开更多
Six sesquiterpenes, including three guaiane type sesquiterpenes （1-3）, one oplopanone type sesquiterpene （4）, one xanthane type sesquiterpene （5） and one salvialane type sesquiterpene （6）, were isolated from A...Six sesquiterpenes, including three guaiane type sesquiterpenes （1-3）, one oplopanone type sesquiterpene （4）, one xanthane type sesquiterpene （5） and one salvialane type sesquiterpene （6）, were isolated from Alisma plantago-aquatica for the first time. The structures of these six compounds were elucidated as alismoxide （1）, alismol （2）, orientalol B （3）, oplopanone （4）, gibberodione （5）, and 7a, lOa-epoxy-salvialan-1Ofl-ol （6）, respectively, among which 6 was a new natural product. Xanthane type and salvialane type sesquiterpenes were obtained from the genus Alisma for the first time. In addition, a plausible biosynthetic pathway for all isolates was discussed.展开更多
基金Supported by National Natural Science Foundation of China(41161082)Gansu Natural Science Foundation(1107RJZA167)~~
文摘[Objective] The aim was to research influential factors of water productivity of maize in oasis in arid areas. [Method] In middle reach of Heihe River in Linze County of Zhangye City, maize, a major crop in irrigated area in the oasis, was studied and nine influential factors were chosen through grey relation analysis. [Result] According to grey relation analysis, top five factors influencing water produc- tivity of maize during 1995-2009 were as follows： applied quantity of chemical fertil- izers〉labour input〉seeds〉mulch amount〉pesticide amount, which indicated that controllable factors, instead of uncontrollable ones, dominate in influence of water productivity of maize in oasis in arid areas. [Conclusion] With water resource limited, investment of controllable factors in high-efficient agricultural production should be the major strategy to improve water productivity of maize in oasis of arid areas.
基金Supported by Qiannan Forestry S&T Promotion Project~~
文摘A simple, easily-operated and economical carbonization technology with Eupatorium adenophorum was introduced in terms of instrument selection, carboniza- tion of Eupatorium adenophorum and preparation of carbon rod, and evaluation was made on economic profits from carbonization of Eupatorium adenophorum.
文摘There is a variety of nice results about strongly Gorenstein flat modules over coherent rings. These results are done by Ding, Lie and Mao. The aim of this paper is to generalize some of these results, and to give homological descriptions of the strongly Gorenstein flat dimension (of modules and rings) over arbitrary associative rings.
基金The National Science and Technology Major Project of“Technological study on the safety and standards of Chinese materia medica”(Grant No.2014ZX09304307-001-011)Chinese materia medica supporting program of“Quality control base construction of Chinese material medica including Isatidis Radix,Carthami Flos,etc”by Ministry of Industry and Information Technology of Peoples Republic of China
文摘Six sesquiterpenes, including three guaiane type sesquiterpenes （1-3）, one oplopanone type sesquiterpene （4）, one xanthane type sesquiterpene （5） and one salvialane type sesquiterpene （6）, were isolated from Alisma plantago-aquatica for the first time. The structures of these six compounds were elucidated as alismoxide （1）, alismol （2）, orientalol B （3）, oplopanone （4）, gibberodione （5）, and 7a, lOa-epoxy-salvialan-1Ofl-ol （6）, respectively, among which 6 was a new natural product. Xanthane type and salvialane type sesquiterpenes were obtained from the genus Alisma for the first time. In addition, a plausible biosynthetic pathway for all isolates was discussed.
