pebble-covered
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Based on the analysis on the character of MPDI, the relationship between NDVI and MPDI is studied, and the threshold value of MPDI under densely vegetation covered, middle vegetation covered, sparse vegetation covered and nudation are built. MPDI>0.12 means the surface is desert,sand or rocks; 0.01<MPDI<0.12 means the sureface is covered by middle vegetation, and MPDI<0.01 means the earth is covered by densely vegetation. 4. Based on the expirical model relation between MPDI and vegetation optical thickness, the latter is computed by the modified algorithm.
在分析微波极化差异指数MPDI特性的基础上,分析了新疆植被指数NDVI和微波极化差异指数MPDI二者的相关关系,并建立了浓密植被覆盖、中等植被覆盖以及稀疏植被覆盖和裸露地表三种植被覆盖状况所对应的微波极化差异指数MPDI阈值。
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The results showed:Under the same fertilizer consumption,covered with straw and covered with film can increase the chlorophyll content and total leer area duration of the maize,can improve leaf nitrate reeducates activity,Photosynthesis and roots vigor,and the nitrate reeducates activity,the chlorophyll content and the roots vigor present positive correlation with yield. Meanwhile,average dry matter accumulation of straw-covered increased 7.1% than this of no-ploughed,yield increased 15.3%.The average dry matter accumulation of film-covered increased 20.1% than which of no-ploughed and 12.1% than which of plough and covered with straws.And yield increased 26.8% and 10.1%,notable differences.
结果表明:在相同的肥料用量条件下,秸秆覆盖和薄膜覆膜对玉米生长发育具有良好的促进作用,能显著增加玉米叶片叶绿素含量和光合势,增强叶片硝酸还原酶活性和根系活力,同时玉米叶片硝酸还原酶活性、叶绿素含量、根系活力等与最终籽粒产量呈正相关;秸秆覆盖比免耕全生育期平均单株干物质积累量增加7.1%,籽粒产量增加15.3%,薄膜覆膜分别比免耕和翻耕残茬覆盖全生育期平均单株干物质积累量增加20.1%和12.1%,最终籽粒产量增加26.8%和10.1%,差异显著。
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Pebble Beach Golf Links, The Links at Spanish Bay, and Spyglass Hill are owned by the Pebble Beach Company and are all public courses.
圆石滩高尔夫球场,链接西班牙湾,眺远山和所拥有的圆石滩公司和所有的公共课程。
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pebble cheviot:绉面大衣呢
pebble bed regenerator 卵石床蓄热器 | pebble cheviot 绉面大衣呢 | pebble crepe 苔绒绉
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pebble mill:卵石式研磨机
pebble heater 卵石加热炉 | pebble mill 卵石式研磨机 | pebble 球石
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wind kanter; facetted pebble; ventifact; sand-blasted pebble; windworn pebble:风棱石
风速器 wind gauge | 风蚀沟 wind gully | 风棱石 wind kanter; facetted pebble; ventifact; sand-blasted pebble; windworn pebble