Effects of Water Deficit on Photosynthesis Characteristics and Yield of  Watermelon in Gravel-mulched Field in Arid Regions(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effects of Water Deficit on Photosynthesis Characteristics and Yield of  Watermelon in Gravel-mulched Field in Arid Regions

Author(s):: HUANG Shansong1; SHEN Hui1; 2; 3; TIAN Juncang1; 2; 3; ZHANG Xiao1; (1.School of Civil Engineering and Water Conservancy,Ningxia University,Yinchuan,Ningxia 750021;2.Ningxia Water-saving Irrigation and Water Resources Regulation Engineering Technology Research Center,Yinchuan,Ningxia 750021;3.Arid Areas of Modern Agricultural Water Resources Efficient Use of Engineering Research Center of Ministry of Education,Yinchuan,Ningxia 750021)

Keywords:: water deficit; watermelon in gravel-mulched field; photosynthesis characteristics; yield

Abstract:: n order to study the effects of water deficit on photosynthesis characteristics and yield of watermelon in gravel-mulched field in arid regions,‘Jincheng 5’ were used as the test material,three sprinkler irrigation quotas per 667 m2 were set as:0 m3(T1),1.5 m3 (T2),3 m3 (T3).The results showed that,under the experimental conditions,both of the diurnal change of the photosynthetic rate(Pn) and leaf stomatal conductance(Gs) in fruit-expanding-period showed a double peak curve,and the transpiration rate(Tr) showed a single peak curve.In the meantime,all of them increased with the increase of irrigation quota.To the contrary,the values of intercellular CO2 concentration (Ci) showed the opposite change law.By the comprehensive analysis,under the condition of water resources shortage,it was proposed that the suitable sprinkler irrigation quota per 667 m2 was 3 m3.

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Last Update: 2017-08-01