Based on the synchronous joint gravity and magnetic inversion of single interface by Pilkington and the need of revealing Cenozoic and crystalline basement thickness in the new round of oil-gas exploration, we propose...Based on the synchronous joint gravity and magnetic inversion of single interface by Pilkington and the need of revealing Cenozoic and crystalline basement thickness in the new round of oil-gas exploration, we propose a joint gravity and magnetic inversion methodfor two-layer models by concentrating on the relationship between the change of thicknessI and position of the middle layer and anomaly and discuss the effects of the key parameters. Model tests and application to field data show the validity of this method.展开更多
This study aimed to gain more high-quality rice with less water and im- prove the level of national food security. Based on the optimized planting density of rice with drip irrigation, direct sowing technology for pla...This study aimed to gain more high-quality rice with less water and im- prove the level of national food security. Based on the optimized planting density of rice with drip irrigation, direct sowing technology for plastic-film-covered rice cultiva- tion with drip irrigation was proposed. Furthermore, sowing planter for plastic-film- covered drip-irrigation rice cultivation was developed in accordance with the require- ments for the combination of agricultural technique and agricultural machinery. Ac- cording to the large-scale field production evaluation, the film-punching direct-sowing technology for dry cultivation of rice can greatly reduce the labor consumption and results in neat emergence of seedlings. Productive practice shows that using the developed sowing planter for plastic-film-covered rice cultivation with drip irrigation leads to vacancy rate ≤3%, pass rate of grain number ≥85%, soil-covering rate ≥ 95%, and hole number per acre of 31 000-33 000. In addition, the sowing planter can adapt to the agronomic technical requirements for high-density cultivation of rice and provide technical support for the rice production in arid regions of China. Key words Fargesia murielae; Nutrition mechanism; Age grade; Nutrient distribution展开更多
RNA interference （RNAi）, caused by endogenous or exogenous double- stranded RNA （dsRNA） homologous with target genes, refers to gene silencing widely existing in animals and plants. It was first found in plants, a...RNA interference （RNAi）, caused by endogenous or exogenous double- stranded RNA （dsRNA） homologous with target genes, refers to gene silencing widely existing in animals and plants. It was first found in plants, and now it has developed into a kind of biotechnology as well as an important approach in post- genome era. This paper is to summarize the achievements of studies on RNAi tech- nology in basic biology, medicine, pharmacy, botany and other fields.展开更多
The recent progress on the proteins in edible insects was summarized, in- cluding the nutritional value, healthy value, food safety, extraction and content mea- surement of the proteins in edible insects, as well as t...The recent progress on the proteins in edible insects was summarized, in- cluding the nutritional value, healthy value, food safety, extraction and content mea- surement of the proteins in edible insects, as well as the main development direc- tion of edible insect proteins. And we also pointed out the bottlenecks that restricted the development and utilization of proteins in edible insects, and proposed the prospect of the research, development and utilization of edible insects proteins.展开更多
基金Supported by the National Natural Science Foundation of China(Grant No.40674063)National Hi-tech Research and Development Program of China(863Program)(Grant No.2006AA09Z311)
文摘Based on the synchronous joint gravity and magnetic inversion of single interface by Pilkington and the need of revealing Cenozoic and crystalline basement thickness in the new round of oil-gas exploration, we propose a joint gravity and magnetic inversion methodfor two-layer models by concentrating on the relationship between the change of thicknessI and position of the middle layer and anomaly and discuss the effects of the key parameters. Model tests and application to field data show the validity of this method.
文摘This study aimed to gain more high-quality rice with less water and im- prove the level of national food security. Based on the optimized planting density of rice with drip irrigation, direct sowing technology for plastic-film-covered rice cultiva- tion with drip irrigation was proposed. Furthermore, sowing planter for plastic-film- covered drip-irrigation rice cultivation was developed in accordance with the require- ments for the combination of agricultural technique and agricultural machinery. Ac- cording to the large-scale field production evaluation, the film-punching direct-sowing technology for dry cultivation of rice can greatly reduce the labor consumption and results in neat emergence of seedlings. Productive practice shows that using the developed sowing planter for plastic-film-covered rice cultivation with drip irrigation leads to vacancy rate ≤3%, pass rate of grain number ≥85%, soil-covering rate ≥ 95%, and hole number per acre of 31 000-33 000. In addition, the sowing planter can adapt to the agronomic technical requirements for high-density cultivation of rice and provide technical support for the rice production in arid regions of China. Key words Fargesia murielae; Nutrition mechanism; Age grade; Nutrient distribution
文摘RNA interference （RNAi）, caused by endogenous or exogenous double- stranded RNA （dsRNA） homologous with target genes, refers to gene silencing widely existing in animals and plants. It was first found in plants, and now it has developed into a kind of biotechnology as well as an important approach in post- genome era. This paper is to summarize the achievements of studies on RNAi tech- nology in basic biology, medicine, pharmacy, botany and other fields.
基金Supported by the Special Fund for Agro-scientific Research in the Public Interest(200904025)the Natural Science Foundation of Beijing(6122024)+1 种基金the Surface Project of the Science and Technology Development Program of Beijing Municipal Education Commission(KM200900005002)the Project for the Agricultural Science and Technology of Beijing(20110115)~~
文摘The recent progress on the proteins in edible insects was summarized, in- cluding the nutritional value, healthy value, food safety, extraction and content mea- surement of the proteins in edible insects, as well as the main development direc- tion of edible insect proteins. And we also pointed out the bottlenecks that restricted the development and utilization of proteins in edible insects, and proposed the prospect of the research, development and utilization of edible insects proteins.
