A study was conducted in Côte d’Ivoire to assess the after-effect of phosphate amendments on rice yields and soil properties. Eight types of amendments, composed of Moroccan phosphate rock (PRM) and triple super...A study was conducted in Côte d’Ivoire to assess the after-effect of phosphate amendments on rice yields and soil properties. Eight types of amendments, composed of Moroccan phosphate rock (PRM) and triple superphosphate were tested in three agroecological zones over three consecutive years of cultivation. This study revealed that the application of Moroccan phosphate rock (PRM) and/or triple superphosphate (TSP) did not significantly affect soil cation exchange capacity (CEC) and organic carbon (Corg) content. However, there was a negative residual effect of PRM-rich treatments on soil pH and K and N content, but the impact varies depending on the characteristics of the soils studied. Furthermore, nutrient losses, notably nitrogen from −17.5 to −267.7 kg/ha and potassium (−0.1 to 0.7 kg/ha), were observed in all treatments. Only phosphorus showed a positive balance of +49.56 to +52 kg/ha in PRM-rich treatments. Treatment T3, composed of 80% RPM and 20% TSP, was the most effective in all zones, with a relative increase in grain yields of over 100% compared to the control. These results suggest that the input of natural phosphate rock can significantly improve rice yields and soil properties in the studied agroecological zones in Côte d’Ivoire.展开更多
To reveal the period and after-effect of soil water stress on winter wheat, the article employs the experiment results carried out in the greenhouse. The results showed that the root-restricted weights varied with str...To reveal the period and after-effect of soil water stress on winter wheat, the article employs the experiment results carried out in the greenhouse. The results showed that the root-restricted weights varied with stress degrees and stress times during and after water stressing. In the course of stress, the chief reason resticting the weight of root was the stress intensity at this time, and that of severe stress treatment was larger than that of mild stress treatment. After water stress was relieved, the results of the after-effect of soil water stress on root growth were that, the stress intensity of short-time and mild stress was larger than that of long-time and severe stress. Comparing two-stage stress intensities, root-restricted weight resulted from after-effect intensity of stress under all of the short-time treatment, and the mild and the long-time stress treatments, while that resulted from the period stress intensity under the severe and the long-time stress treatments. In general, the effects of water stress on root were attributed to the three factors, a formed basis in the previous stage, the after-effect of water condition before this stage and influence of water in this stage, which lead to the characters of root in the whole growth stage.展开更多
随着时代的发展和社会的进步,影视制作技术也得到了长足的发展。目前,Adobe After Effect作为一款简单易学的视频后期处理软件,在影视后期制作中得到了越来越广泛的应用。该文就Adobe After Effect在影视后期制作的应用做了相关的阐述...随着时代的发展和社会的进步,影视制作技术也得到了长足的发展。目前,Adobe After Effect作为一款简单易学的视频后期处理软件,在影视后期制作中得到了越来越广泛的应用。该文就Adobe After Effect在影视后期制作的应用做了相关的阐述和分析。展开更多
Adobe After Effects是一款在动画和影视后期制作方面不可或缺的软件,在特效制作方面有着优秀的表现,而且它还拥有大量的插件来丰富它的各种功能。After Effects表达式在视频制作中的使用,能避免一些烦琐无趣的工作,可以精确地控制各种...Adobe After Effects是一款在动画和影视后期制作方面不可或缺的软件,在特效制作方面有着优秀的表现,而且它还拥有大量的插件来丰富它的各种功能。After Effects表达式在视频制作中的使用,能避免一些烦琐无趣的工作,可以精确地控制各种属性,从而大幅提高工作效率。基于此,介绍After Effects表达式的语法、特点和优势,并把表达式应用在三维曲线路径建立方面,完成粒子在三维空间穿梭镜头的制作。展开更多
文摘A study was conducted in Côte d’Ivoire to assess the after-effect of phosphate amendments on rice yields and soil properties. Eight types of amendments, composed of Moroccan phosphate rock (PRM) and triple superphosphate were tested in three agroecological zones over three consecutive years of cultivation. This study revealed that the application of Moroccan phosphate rock (PRM) and/or triple superphosphate (TSP) did not significantly affect soil cation exchange capacity (CEC) and organic carbon (Corg) content. However, there was a negative residual effect of PRM-rich treatments on soil pH and K and N content, but the impact varies depending on the characteristics of the soils studied. Furthermore, nutrient losses, notably nitrogen from −17.5 to −267.7 kg/ha and potassium (−0.1 to 0.7 kg/ha), were observed in all treatments. Only phosphorus showed a positive balance of +49.56 to +52 kg/ha in PRM-rich treatments. Treatment T3, composed of 80% RPM and 20% TSP, was the most effective in all zones, with a relative increase in grain yields of over 100% compared to the control. These results suggest that the input of natural phosphate rock can significantly improve rice yields and soil properties in the studied agroecological zones in Côte d’Ivoire.
基金the Ministry of Science and Technology of China （1999011700） the National Natural Science Foundation of China （49971042）.
文摘To reveal the period and after-effect of soil water stress on winter wheat, the article employs the experiment results carried out in the greenhouse. The results showed that the root-restricted weights varied with stress degrees and stress times during and after water stressing. In the course of stress, the chief reason resticting the weight of root was the stress intensity at this time, and that of severe stress treatment was larger than that of mild stress treatment. After water stress was relieved, the results of the after-effect of soil water stress on root growth were that, the stress intensity of short-time and mild stress was larger than that of long-time and severe stress. Comparing two-stage stress intensities, root-restricted weight resulted from after-effect intensity of stress under all of the short-time treatment, and the mild and the long-time stress treatments, while that resulted from the period stress intensity under the severe and the long-time stress treatments. In general, the effects of water stress on root were attributed to the three factors, a formed basis in the previous stage, the after-effect of water condition before this stage and influence of water in this stage, which lead to the characters of root in the whole growth stage.
文摘Adobe After Effects是一款在动画和影视后期制作方面不可或缺的软件,在特效制作方面有着优秀的表现,而且它还拥有大量的插件来丰富它的各种功能。After Effects表达式在视频制作中的使用,能避免一些烦琐无趣的工作,可以精确地控制各种属性,从而大幅提高工作效率。基于此,介绍After Effects表达式的语法、特点和优势,并把表达式应用在三维曲线路径建立方面,完成粒子在三维空间穿梭镜头的制作。
