1) land use plan covering all planning area
用地全覆盖
2) To cover with lichens.
用地衣覆盖
3) whole-ground plastic mulching
全地面地膜覆盖
4) film-covering
全程地膜覆盖
1.
The film-covering cultivation of rice through growing season is a new technology developed recently which could increase the rice yield in the rice field of cold water in high moutain areas.
水稻全程地膜覆盖湿润栽培是改造低产水田、促进水稻高产的一项新技术。
5) VORDAC
地区覆盖用甚高频全向信标测距装
6) land use/cover
土地利用/覆盖
1.
Classification system of land use/cover in mining area based on RS;
论基于遥感的矿区土地利用/覆盖分类体系
2.
Guye district in Tangshang city was become study object,taking three temporal(1987,1992 and 2001) remotely sensed imageries as data resource,and imageries were pretreated by ENVI and interpreted by human-computer interaction,three land use/cover classification map of remotely sensed imageries were obtained,at the same time pixel count of land use/cover types were obtained.
选择唐山市古冶区为研究对象,以3个时相(1987年、1992年和2001年)遥感图像为数据源,利用ENVI对图像进行预处理和人机交互解译,获取3期遥感图像的土地利用/覆盖分类图,同时获取各土地利用/覆盖类型的像元数。
3.
Pixel-based and classification based remote sensed data are the two normal methods during the traditional land use/cover change detection,which make use of the single-source spectral to extract the changed land use/cover information,while texture and other spatial information are neglected.
传统卫星遥感的土地利用/覆盖变化动态监测方法基本上可分为光谱直接比较法和分类比较法两大类,但两类方法多以光谱信息为基础来提取土地利用变化信息,而忽略纹理等空间信息。
补充资料:地膜覆盖(plastic membrane mulching)
地膜覆盖(plastic membrane mulching)
用塑料薄膜覆盖地面的一种栽培措施。一般采用厚度为0.015mm左右的高压聚乙烯透明塑料微薄膜,有透光性好、导热性差、不透气,在低温易冻、热量不足条件下,可起增温、保墒、改善近地面气层的光热条件,促进土壤微生物活动,改善土壤理化性质,提高CO2浓度等作用。东北、华北和西北等地区,在棉花、花生、烟草、水稻、小麦、玉米、甘薯、马铃薯等方面获得明显的增产效果。
塑料微薄膜的种类有透明膜、黑色膜、灰色膜、黑白双重膜、铝箔膜等;有在薄膜内面涂有除草剂或杀虫剂的杀草膜或防虫膜;有按栽植作物株行距要求开好孔的有孔膜,还有厚度仅为0.008mm的低压聚乙烯微薄膜,每公顷用量仅为一般高压膜的40%左右。
覆盖方式有行间覆盖与根区覆盖,根区覆盖又可分为畦作覆盖、垄作覆盖、平作覆盖和沟作覆盖。
地膜覆盖度的计算方法,是以塑料薄膜的宽度和行距之比表示。生产上应用的覆盖度大多为50-80%。可分为两种形式:先播种后覆膜和先覆膜后打孔播种。覆盖时间,干旱少雨地区,早春整地或选墒后立即覆膜,防止土壤水分蒸发,待适温时播种,以保全苗。但春风较大的地区,不宜过早覆膜,以防大风揭膜。雨量较多或土壤水分充足的地区,可在播种前后覆膜。
覆盖时要将薄膜展开拉紧,使之紧贴地面,不得产生皱褶松弛或损坏膜面。薄膜的两侧、两头都要开沟埋入土中,边覆边埋,压紧压严。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条