The Suitability Analysis Of Water Saving Irrigation In Field On Major Crops In Hexi Oasis Irrigated Areas

Technology, crop and farmers, etc. three first evaluating indexes and investing equipment, homogeneous degree of irrigation, the adaptability for topography, the adaptability for penetrability, ratio of water saving, the range of increased production, the level of technique matching with crops, the bear ability of farmers, difficulty level to operation and beneficial results, etc. ten second evaluating indexes were constructed By investigation and analyzing the papers; furthermore, using these indexes make the comprehensive evaluation for the water saving irrigation in field of border irrigation, furrow irrigation, irrigation on plastic film, controlled alternative irrigation, surge irrigation, sprinkler irrigation, drip irrigation, subsurface drip irrigation, no-winter irrigation, etc. on wheat, corn, vegetable in field and vegetable in greenhouse ,etc. It made the these conclusion. The suitable water saving irrigation technologies for wheat successively is irrigation on plastic film, sprinkler irrigation, border irrigation, drip irrigation, controlled alternative irrigation, furrow irrigation, subsurface drip irrigation, surge irrigation, no-winter irrigation under the limited of techniques, crop and farmer at the present stage. The suitable water saving irrigation technologies for corn successively is irrigation on plastic film, drip irrigation, controlled alternative irrigation, furrow irrigation, subsurface drip irrigation, sprinkler irrigation, border irrigation, no-winter irrigation, surge irrigation. The suitable water saving irrigation technologies for vegetable in field successively is irrigation on plastic film, furrow irrigation, sprinkler irrigation, no-winter irrigation, drip irrigation, subsurface drip irrigation, controlled alternative irrigation, border irrigation, surge irrigation. The suitable water saving irrigation technologies for vegetable in greenhouse successively is irrigation on plastic film, furrow irrigation, drip irrigation, subsurface drip irrigation, no-winter irrigation, sprinkler irrigation, controlled alternative irrigation, border irrigation, surge irrigation. The trend of irrigation in field as follows: The suitable water saving irrigation technologies for wheat successively is sprinkler irrigation, irrigation on plastic film, drip irrigation, subsurface drip irrigation, surge irrigation, border irrigation, controlled alternative irrigation, furrow irrigation, no-winter irrigation under the limited of techniques and crop in the future. The suitable water saving irrigation technologies for corn successively is drip irrigation, subsurface drip irrigation, irrigation on plastic film, sprinkler irrigation, controlled alternative irrigation, furrow irrigation, surge irrigation, border irrigation, no-winter irrigation. The suitable water saving irrigation technologies for vegetable in field successively is sprinkler irrigation, drip irrigation, irrigation on plastic film, subsurface drip irrigation, furrow irrigation, no-winter irrigation, surge irrigation, controlled alternative irrigation, border irrigation. The suitable water saving irrigation technologies for vegetable in greenhouse successively is drip irrigation, subsurface drip irrigation, sprinkler irrigation, irrigation on plastic film, furrow irrigation, no-winter irrigation, surge irrigation, controlled alternative irrigation, border irrigation. In a word, the development trend of irrigation in field is to adopt the advanced irrigation techniques of sprinkler , drip irrigation and subsurface drip irrigation, etc. The demonstration research in Zhangye made the following conclusions. the results of the study on three water saving irrigation in sunshine greenhouse of cucumber showed that the production efficiency of drip irrigation under plastic mulch attain 32.46kg/m3 and 15.70kg/m3 of furrow irrigation. drip irrigation under plastic mulch can decrease the plant disease and insect pests and cost; The ratio of production to investment for drip irrigation under plastic film is higher 14% and 39% than furrow irrigation under plastic film and furrow irrigation respectively, it has higher beneficial results. The utilized effect of sprinkler and drip irrigation in field indicated: sprinkler and subsurface drip irrigation saved electricity 30%~40%, water 50% than furrow irrigation. The no-winter irrigation research on pepper indicated: the no-winter irrigation saved water about 20% than winter irrigation. No-winter irrigation on corn saved water 60m3 than winter irrigated pepper, but no-winter irrigated field for corn need irrigation at spring.