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《Journal of Jilin Agricultural Sciences》 2009-01
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Studies on Water-saving Technique by Micro-spray Irrigation of Fruit Tree Growing on Sandy Soil

YANG Jing1,LIU Hi-tao2,SONG Zhu-fu3,REN Jun2(1.Forestry Bureau of Shuangliao County,Jilin Province,Shuangliao 136400;2.Academy of Agricultural Sciences of Jilin Province,Changchun 130033;3.Forestry Bureau of Erdaojiang District,Tonghua City,Tonghua 134003,China)  
Micro-spray irrigation could save 36.3% of water comparing with flooding irrigation of fruit tree growing on sandy soil.For 0-20cm,21-40cm and 41-60cm layer,the soil bulk density of the mi-cro-spray irrigation was 5.5%,3.0% and 1.2% less than that of flooding irrigation,while the soil porosity was respectively 8%,2.3% and 9.5% higher,respectively.On the other hand,for 0-20cm,21-40cm and 41-60cm layer,the soil water content of the micro-spray irrigation increased 10.9%,17.1% and 15.4%.When trees were micro-spray irrigated for 1hour at noon,the air temperature under fruit tree canopy decreased from 30.7℃ to 27.2℃,while the relative humidity increased from 65.1% to 75.6%.The newer branches' growth rate increased 14.0%,and canopy projection area enhanced 14.2% by micro-spray irrigation.The yield and single fruit weight of plum increased 22% and 9.7%,while soluble solid of fruit declined 2.7%.Therefore,mi-cro-spray irrigation improved the soil physical properties,soil porosity and soil water content.Micro-spray irrigation avoided surface runoff and significantly enhanced the water and fertilizers conservation.
【Fund】: 科技部农业科技成果转化资金项目(03EFN216900279)
【CateGory Index】: S66
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