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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 典型山区耕地面积与粮食产量时空格局分析——以四川省凉山州为例 期刊论文 水土保持研究, 2014, 卷号: 21, 期号: 5, 页码: 1-6 作者:  刘运伟 收藏  |  浏览/下载：20/0  |  提交时间：2015/06/04 凉山州  耕地面积  粮食产量  最小人均耕地面积  耕地压力指数  时空格局   Pollen indication to source plants in the eastern desert of China 期刊论文 CHINESE SCIENCE BULLETIN, 2005, 卷号: 50, 期号: 15, 页码: 1632-1641 作者:  Li, YC;  Xu, QH;  Zhao, YK;  Yang, XL;  Xiao, JL 收藏  |  浏览/下载：15/0  |  提交时间：2018/09/26 Eastern Desert Of China  Pollen Indication  Association Indices (a)  Over-representation Indices (o)  Under-representation Indices (u)  Correlation Coefficients (Cc)  Similarity Coefficients (c)  Detrended Correspondence Analysis (Dca)  Cluster Analysis (Cla)  Ratios Of Nitraria And Ephedra (N/e)  Ratios Of Ephedra And Artemisia (E/a)  Ratios Of Artemisia And Chenopodiaceae (A/c)   Pollen indication to source plants in the eastern desert of China 期刊论文 CHINESE SCIENCE BULLETIN, 2005, 卷号: 50, 期号: 15, 页码: 1632-1641 作者:  Li, YC;  Xu, QH;  Zhao, YK;  Yang, XL;  Xiao, JL 收藏  |  浏览/下载：14/0  |  提交时间：2018/09/26 Eastern Desert Of China  Pollen Indication  Association Indices (a)  Over-representation Indices (o)  Under-representation Indices (u)  Correlation Coefficients (Cc)  Similarity Coefficients (c)  Detrended Correspondence Analysis (Dca)  Cluster Analysis (Cla)  Ratios Of Nitraria And Ephedra (N/e)  Ratios Of Ephedra And Artemisia (E/a)  Ratios Of Artemisia And Chenopodiaceae (A/c)   Pollen indication to source plants in the eastern desert of China SCI/SSCI论文 2005 Li Y. C.; Xu Q. H.; Zhao Y. K.; Yang X. L.; Xiao J. L.; Chen H.; Lu X. M. 收藏  |  浏览/下载：18/0  |  提交时间：2012/06/08 eastern desert of China  pollen indication  association indices (A)  over-representation indices (O)  under-representation indices (U)  correlation coefficients (CC)  similarity coefficients (C)  detrended  correspondence analysis (DCA)  cluster analysis (CLA)  ratios of  Nitraria and Ephedra (N/E)  ratios of Ephedra and Artemisia (E/A)  ratios of Artemisia and Chenopodiaceae (A/C)  source area  forest composition  inner-mongolia  surface pollen  vegetation  representation  calibration  assemblages  frequencies  usa