Mulching can effectively maintain soil moisture;color of mulching film affects soil water storage capacity and further promote crop growth to improve grain yield.Field experiment was conducted to study effects of diff...Mulching can effectively maintain soil moisture;color of mulching film affects soil water storage capacity and further promote crop growth to improve grain yield.Field experiment was conducted to study effects of different film colors on dry matter accumulation(DMA)and grain yield of oil flax.Results showed that white plastic film mulching could increase leaf area,chlorophyll content and DMA.DMA of white film mulching and micro-ridge with soil covering was 53.0%higher than that of CK,and 7.8%higher than that of black film mulching.Mulching method also influenced DMA.Micro-ridge alone increased it by 13.7%than flat cultivation and soil covering improved another 7.6%under white film mulching.Both white and black film mulching with microridge could significantly improve grain yield.Black film mulching with micro-ridge and soil covering,white film mulching with micro-ridge and no soil covering significantly increased capsule number per plant,1,000-grain weight and grain yield of oil flax,compared with CK.Grain yield increased 29.0%and 28.9%respectively.These results indicated that the above mulching methods were suitable for high yield cropping pattern in dry-farming regions.展开更多
Preparation and photo-patterning characteristics of organic-inorganic hybrid thin film containing latent pigment by using photo-acid-generator (PAG) and microwave irradiation have been investigated. The acrylic thin f...Preparation and photo-patterning characteristics of organic-inorganic hybrid thin film containing latent pigment by using photo-acid-generator (PAG) and microwave irradiation have been investigated. The acrylic thin film modified with methoxysilane containing PAG was formed on a glass substrate and irradiated with ultraviolet rays to promote sol-gel reaction by catalytic action of acid which was generated from PAG. And then the film was hardened with microwave irradiation, yielding organic-inorganic hybrid polymer film having hardness, highly transparency and strong adhesion with a glass substrate. Since this reaction only occurred in the optically (UV) irradiated regions, by exploiting the difference between the adhesivenesses of these regions photo-irradiated through photomask with a glass substrate, it was possible to form a patterned film with pitch of 100 to 50 μm by a simple lift-off method. A pigment-containing film using latent pigments (with subtractive three primary colors of coloring materials) and a patterned film were prepared, and it was possible to make these films multi-colored by varying the mixing ratio of the pigments. This multi-colored film-preparation method is effective for simply and efficiently forming a color-filter film by applying optical and microwave irradiation.展开更多
花青素作为植物体内存在的天然物质,不仅对人体无毒无害,还具有良好的抗氧化性能。采用溶剂提取法和超声波辅助提取法提取黑果枸杞花青素,再将花青素溶液与成膜基质共混后制备成花青素复合膜,并对复合膜进行厚度、含水率、水溶性、抗氧...花青素作为植物体内存在的天然物质,不仅对人体无毒无害,还具有良好的抗氧化性能。采用溶剂提取法和超声波辅助提取法提取黑果枸杞花青素,再将花青素溶液与成膜基质共混后制备成花青素复合膜,并对复合膜进行厚度、含水率、水溶性、抗氧化性、pH显色、红外吸收光谱等性能测定。实验测得复合膜的平均厚度为0.0387 mm,含水率为22.78%,水溶性为31.55%,水蒸气透过系数为6.2359×10^(-4)g·mm·Pa^(-1)·h^(-1)·m^(-2),1,1-二苯基-2-三硝基苯肼(DPPH)抗性相当于1 mL 0.02 mol/L标准维生素E溶液的15.84倍,且在不同pH的缓冲溶液中具有良好的显色效应。实验制备得到的花青素智能显色膜具有与普通保鲜膜相似的外观和物理性质,能在水中自发降解并拥有极佳的抗DPPH自由基能力,具有良好食品包装应用前景。展开更多
基金financial supports provided by the National Natural Science Programs of China(31360315,31760363)the China Agriculture Research System of Construct Special(CARS-14-1-16)the Fuxi Outstanding Talent Cultivation Plan of Gansu Agricultural University(Gaufx-02J05)。
文摘Mulching can effectively maintain soil moisture;color of mulching film affects soil water storage capacity and further promote crop growth to improve grain yield.Field experiment was conducted to study effects of different film colors on dry matter accumulation(DMA)and grain yield of oil flax.Results showed that white plastic film mulching could increase leaf area,chlorophyll content and DMA.DMA of white film mulching and micro-ridge with soil covering was 53.0%higher than that of CK,and 7.8%higher than that of black film mulching.Mulching method also influenced DMA.Micro-ridge alone increased it by 13.7%than flat cultivation and soil covering improved another 7.6%under white film mulching.Both white and black film mulching with microridge could significantly improve grain yield.Black film mulching with micro-ridge and soil covering,white film mulching with micro-ridge and no soil covering significantly increased capsule number per plant,1,000-grain weight and grain yield of oil flax,compared with CK.Grain yield increased 29.0%and 28.9%respectively.These results indicated that the above mulching methods were suitable for high yield cropping pattern in dry-farming regions.
文摘Preparation and photo-patterning characteristics of organic-inorganic hybrid thin film containing latent pigment by using photo-acid-generator (PAG) and microwave irradiation have been investigated. The acrylic thin film modified with methoxysilane containing PAG was formed on a glass substrate and irradiated with ultraviolet rays to promote sol-gel reaction by catalytic action of acid which was generated from PAG. And then the film was hardened with microwave irradiation, yielding organic-inorganic hybrid polymer film having hardness, highly transparency and strong adhesion with a glass substrate. Since this reaction only occurred in the optically (UV) irradiated regions, by exploiting the difference between the adhesivenesses of these regions photo-irradiated through photomask with a glass substrate, it was possible to form a patterned film with pitch of 100 to 50 μm by a simple lift-off method. A pigment-containing film using latent pigments (with subtractive three primary colors of coloring materials) and a patterned film were prepared, and it was possible to make these films multi-colored by varying the mixing ratio of the pigments. This multi-colored film-preparation method is effective for simply and efficiently forming a color-filter film by applying optical and microwave irradiation.
文摘花青素作为植物体内存在的天然物质,不仅对人体无毒无害,还具有良好的抗氧化性能。采用溶剂提取法和超声波辅助提取法提取黑果枸杞花青素,再将花青素溶液与成膜基质共混后制备成花青素复合膜,并对复合膜进行厚度、含水率、水溶性、抗氧化性、pH显色、红外吸收光谱等性能测定。实验测得复合膜的平均厚度为0.0387 mm,含水率为22.78%,水溶性为31.55%,水蒸气透过系数为6.2359×10^(-4)g·mm·Pa^(-1)·h^(-1)·m^(-2),1,1-二苯基-2-三硝基苯肼(DPPH)抗性相当于1 mL 0.02 mol/L标准维生素E溶液的15.84倍,且在不同pH的缓冲溶液中具有良好的显色效应。实验制备得到的花青素智能显色膜具有与普通保鲜膜相似的外观和物理性质,能在水中自发降解并拥有极佳的抗DPPH自由基能力,具有良好食品包装应用前景。
