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Validation of CA-Markov for Simulation of Land Use and Cover Change in the Langat Basin, Malaysia

Journal of Geographic Information System 2012年第6期4卷 542-554页

作者： Hadi Memarian Siva Kumar Balasundram Jamal Bin Talib christopher teh Boon Sung Alias Mohd Sood Karim Abbaspour Department of Agriculture Technology Faculty of Agriculture Universiti Putra Malaysia (UPM) Serdang Malaysia Department of Forest Production Faculty of Forestry Universiti Putra Malaysia (UPM) Serdang Malaysia Department of Land Management Faculty of Agriculture Universiti Putra Malaysia (UPM) Serdang Malaysia Swiss Federal Institute of Aquatic Science and Technology (EAWAG) Ueberlandstrasse Switzerland

Validity of CA-Markov in land use and cover change simulation was investigated at the Langat Basin, Selangor, Malaysia. CA-Markov validation was performed using validation metrics, allocation disagreement, quantity disagreement, and figure of merit in a three-dimensional space. The figure of merit, quantity error, and allocation error for total landscape simulation using the 1990-1997 calibration data were 5.62%, 3.53%, and 6.13%, respectively. CA-Markov showed a poor performance for land use and cover change simulation due to uncertainties in the source data, the model, and future land use and cover change processes in the study area.

关键词： Land Use and Cover Change CA-Markov Calibration Validation

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Stable Oxygen and Deuterium Isotope Techniques to Identify Plant Water Sources

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Journal of Water Resource and Protection 2014年第15期6卷 1501-1508页

作者： M. Edwin S. Lubis I. Yani Harahap Taufiq C. Hidayat Y. Pangaribuan Edy S. Sutarta Zaharah A. Rahman christopher teh M. M. Hanafi Indonesia Oil Palm Research Institute Medan Indonesia Universiti Putra Malaysia Serdang Malaysia

There is still very little information on the sources of water absorbed by oil palm plant. This information is very important for water management system in oil palm plantation. Thus, this study was carried out to determine current water sources absorbed by the oil palm roots using oxygen (δ18O) and deuterium isotopes (δD) techniques. Sketches of oxygen and deuterium isotope were total rainfall, throughfall, runoff, measurement at 5 soil depths (namely: 20 cm, 50 cm, 100 cm, 150 cm, and 200 cm), and oil palm stem. Results of this study showed huge variance in the values of oxygen and deuterium isotope. Based on Least Significant Difference (LSD) test, there was no significant value in the oxygen and deuterium isotope of stem water and others;however, a similar value was obtained at the depths of 0 - 20 cm and 20 - 50 cm with the stem water. This indicated that oil palm absorbed water from 0 - 50 cm depth. This result agreed with the oil palm rooting system, which has verified that the root quarter is the most active root of oil palm.

关键词： Deuterium Isotope Technique Plant Water Sources Stable Oxygen

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Four Previously Identified Petunia inflata S-Locus F-Box Genes Are Involved in Pollen Specificity in Se If-I ncom pati bi I ity

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Molecular Plant 2014年第3期7卷 567-569页

作者： Justin S. Williams christopher A. Natale NingWang Shu Li Tarah R. Brubaker Penglin Sun teh-hui Kao Department of Biochemistry and Molecular Biology The Pennsylvania State University University Park PA 16802 USA Intercollege Graduate Degree Program in Plant Biology The Pennsylvania State University University Park PA 16802 USA

Dear Editor, Petunia possesses self-incompatibility （SI）, by which pis- tils reject self-pollen but accept non-self pollen for fertili- zation （de Nettancourt, 2001; Iwano and Takayama, 2012）. Genes that regulate self-/non-self-recognition between pol- len and pistil are located at the highly polymorphic S-locus. An S-haplotype contains the pistil-specific S-RNase gene that regulates pistil specificity （Lee et al., 1994）. The first S-locus F-box （SLIO gene was identified in Antirrhinum hispanicum by Lai et al. （2002）, and subsequently Sijacic et al.

关键词： RNASE PROTEINS

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Stable Oxygen and Deuterium Isotope Techniques to Identify Plant Water Sources

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Journal of Water Resource and Protection（水资源与保护） 2014年第15期 1501-1508页

作者： M. Edwin S. Lubis I. Yani Harahap Taufiq C. Hidayat Y. Pangaribuan Edy S. Sutarta Zaharah A. Rahman christopher teh M. M. Hanafi

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