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Survey of Rice Cropping Systems in Kampong Chhnang Province,Cambodia

Rice science 2013年第2期20卷 154-164页

作者： Volker KLEINHENZ sophon chea Ngin HUN Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH #17Street 306P.O.Box 81Phnom PenhCambodia Provincial Department of Agriculture (PDA) Kampong Chhnang Sangkat KsamKampong ChhnangCambodia Present address:The Herbals Joint Stock Company 8 th FloorBAC A BuildingNo.9Dao Duy Anh StreetDong Da DistrictHanoiVietnam

Although Cambodia might have achieved self-sufficiency and an exported surplus in rice production,its rice-based farming systems are widely associated with low productivity,low farmer income and rural *** study is based on a questionnaire village survey in 14 communes containing 97 villages of Kampong Chhnang Province from March to June,*** analyzes the prevailing rice-based cropping systems and evaluates options for their *** in cropping systems depend on the distance from the Tonle Sap water *** distances greater than 10 km,transplanted wet-season rice cropping system with low productivity of about 1.6 t/hm 2 *** deficiency can be primarily attributed to soils with high coarse sand fractions and low pH （〈 4.0）,use of ＇late＇ cultivars,and exclusive use of self-propagated *** improve this cropping system,commercial ＇medium＇ cultivars help prevent crop failure by shortening the cultivation period by one month and complementation of wet-season rice with non-rice crops should be *** adjacent （≤ 1 km） to the water bodies become inundated for up to seven months between July until January of each *** this area,soils contain more fine sand,silt and clay,and their pH is higher （〉 4.0）.Farmers predominantly cultivate dry-season recession rice between January and ***-nine percent of the area is sown directly and harvested by *** ratio of commercial rice seeds is 59% and yields average 3.2 t/hm *** of the second dry-season rice between April and July may double annual yields in this rice cropping *** upgrading other cultivation technologies,using seeds from commercial sources will improve yield and rice *** with rice,farmers grow non-rice crops at different intensities ranging from single annual crops to intensive sequences at low yields.

关键词： rice cropping system socioeconomic indicator on-farm activity rice production

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