珙桐芽苗移栽育苗技术研究

本文全面研究了芽苗移栽对珙桐苗期生长、成苗率和商品苗合格率的影响,选择确定了芽苗移栽的最佳技术措施:在低丘地区,在相同地点和田问管理水平下开展芽苗移栽可比播种育苗平均苗提高成苗率2.5倍,平均苗高在25cm以上,平均提高27.8％.相对高海拔的原生地育苗,平均提高成苗率近4倍,提高苗高2倍以上.     

姜黄高产栽培技术的研究

提前播种日期和增加播种密度,可增加姜黄产量27.8%。本文建立的回归方程可用于产量预测和寻找最优的栽培措施。     

他们用信念播种“绿色”

环境曾经给予了我们,我们应该怎样回报环境?环境保护是现代生活中人类面临的最大问题,要解决这一问题必须从基础做起。面对这样的问题,有的人正在思考,有的人已经行动。赵希海、刘国田、吴彩梅就是改造环境的佼佼者。他们深知,播种绿色就是播种希望,有了绿色,也就有了希望。     

播种绿色理念 谱写环保篇章——《全国环境宣传教育行动纲要（2011—2015年）》系列专题

2011年4月,环保部、中宣部、中央文明办、教育部、共青团中央、全国妇联六部委联合发布了《全国环境宣传教育行动纲要（2011—2015年）》（以下简称《纲要》）,在全社会引发强烈反响,《纲要》的颁布,对加快推进资源节约型、环境友好型社会的建设,提高生态文明建设水平,有着十分重要的意义。     

从一粒种子到一片家园——马悠夫妇的坚守与创造

高山上还没有松树被砍伐下来／水波可以流向一个异国的世界／人类除了自己的海岸不知有其他／春光水不消逝／徐风温馨吹拂／抚育那不需要播种自然生长的花朵。     

Properties of agricultural aerosol released during wheat harvest threshing, plowing and sowing

This study shows for the first time a chemical and morphological characterization of agricultural aerosols released during three important agricultural operations： threshing, plowing and sowing. The field campaigns were carried out in the eastern part of the Po Valley, Italy, in summer and autumn 2009. The aerosol particles were sampled on quartz fiber filters and polytetrafluoroethylene membranes in order to allow Inductively Coupled Plasma Mass Spectrometry （ICP-MS） analysis and Scanning Electron Microscopy equipped with an Energy Dispersive X-ray Spectrometer （SEM-EDS） investigations, respectively. The organic carbon mass concentrations were measured with a Sunset Laboratory Dual-Optical Organic Carbone/Elemental Carbon （OCEC） Aerosol analyzer. The morphological and chemical analyses by SEM-EDS allowed recognizing four main particle classes： organic, silica, calcite and clay minerals. The organic particles contribute to both fine and coarse aerosol fractions up to ca. 50% for all three agricultural activities. This was also confirmed by OCEC analysis for fine fraction. Most of the agricultural aerosols, about 60%, were single particles and the remaining 40% were agglomerations of particles. The ICP-MS results showed that threshing and plowing produce more aerosol particles than sowing, which was characterized by important amounts of clay minerals produced from land soils.     

播种绿色理念 谱写环保篇章——《全国环境宣传教育行动纲要(2011—2015年)》系列专题

2011年4月,环保部、中宣部、中央文明办、教育部、共青团中央、全国妇联六部委联合发布了《全国环境宣传教育行动纲要(2011-2015年)》(以下简称《纲要》),在全社会引发强烈反响,《纲要》的颁布,