Study On Different Moisture Conserving In Mountain Jujube Orchardon Save Water And Promote Yield

In experimental demonstration areas in Mengcha - Mizhi County in Shaanxi Province, against the situation of the growing tensions in water resources and rain water lowly use efficiency,the experiment was used for the dynamic study on soil moisture,temperature and jujube growth under different moisture conserving no-irrigation by location test in mountain jujube orchard. This ways included:J1:straw mulching is 1Kg/ke, J2:straw mulching is 2Kg/ke, J3:straw mulching is 3Kg/ke, D:film mulching, B8,B8W:water retaining agent is 80g/ke, B12:water retaining agent is 120g/ke,B16: water retaining agent is 160g/ke,we can concluded the results:(1) Treatments of moisture conserving can change the law of soil temperature.During the experiment, Mean soil temperature of different moisture conservings(J1,J2,J3,D,CK) were 22.42℃,22.23℃,22.36℃,25.94℃,22.43℃:J2<J3<J1<CK<D; Max mean changes per day of straw mulchings(J1,J2,J3) were 3.16℃,3.3℃,3.64℃, film mulching was 5.48℃; The time of max soil temperature per day in different soil layers(5cm,10cm,15cm,20cm,25cm) were 14:00,16:00,18:00,18:00,20:00,the lowest was 8:00.(2) Treatments of moisture conserving controlled soil evaporation. During the experiment, mean soil evaporation per day of CK is highest,B12 is lowest,J2 is lower; compared with control, mean soil reductional evaporative per day:J1=19.5%,J2=28.6%,J3=12.95, B16=27.3%,B12=36.4%, B8=27.2%, B8W=16.9%, D=15.65%,and soil cumulative evaporation: CK>J3>D>B8W>J1>B16>B8>J2>B12.(3) Treatments of moisture conserving can change efficiency of soil water and increase soil water storage. Soil water in experimental period: J2>D>B12>J1>J3>B16>B8W>B8>CK;compared with control, mean soil elevation water: J2=34.3%, D=33.3%, B12=30.1%; soil water in soil profile: B12>J2>D>B16>J3>B8>B8W>J1>CK,and soil water is max in 40cm soil depth during 0-160cm; compared with control, soil accumulation elevation water storage:J1=24.8%,J2=35.5%,J3=26.8%,D=28.9%, B8W=18.1%,B8=12.% B12=32.2%,B16=21.5%.(4) Treatments of moisture conserving was helpful to jujube growth and promoted yield per plant. Compared with control,the treatments extent of leaf aera: 3.8%～20.4%; fruit setting rate: -5.3%～ 89.5%;the reductional of fruit cracking rate: 29.9%～63.85%; yield per plant of J1,J2,J3,D,B16,B12,B8W,B8 were increased 22.3%,25.3%,21.5%,-19.3%,19.4%,26.2%,7.6%,1.9%.