Response of jujube growth to initial soil water content in rainfed regions in Loess Plateau
With 6-year-old dwarfed densely Ziziphus jujuba Mill .as experimental materials ,four different initial soil volumetric water content levels (plot 1 ,15 .17% ;plot 2 ,14 .33% ;plot 3 ,11 .34% ;plot 4 ,8 .61% ) were per-formed under rainfed conditions ,and soil water variation ,jujube growth ,jujube water consumption and yield were deter-mined .The results showed that under rainfed conditions ,with the passage of time ,soil volumetric water content of the four plots were nearly the same .There were significant differences among four plots .At low water conditions ,dry layer of jujube plantation can be repaired through natural rainfall .Biomass and yield decreased as the initial soil water content decreased ,and yield among plots were significantly different . The yield of four plots were 21 744 .9 , 18 648 .0 , 12 354 .3 ,and 6 660 .0 kg·hm-2 ,respectively ,suggesting that considerable yield can also be obtained in normal pre-cipitation year even if the initial soil water content under deficit conditions .Jujube with height of 0 .9~1 .2 m and crown of 0 .5~0 .9 m ,had the high level of yield ,as high as 21 744 .9 kg·hm-2 ,indicating large potential of dwarfed densely jujubes .The results can be applied for local rainfed jujube production and management .
Ziziphus jujuba MillLoess Plateauinitial soil water contentsoil moistureyield
国家科技期刊平台
NSTL
万方数据
维普
