几种越橘栽培基质的酸缓冲性及pH值调节技术研究

[目的]确定不同越橘栽培基质适宜的施S时间和施S量。[方法]研究在设施栽培条件下CK（园土）、A（园土、草炭土1∶1）、B（草炭土）、C（园土、腐叶土1∶1）、D（草炭土、蛭石1∶1）、E（草炭土、腐叶土、蛭石、其他材料3∶3∶3∶1）6种越橘栽培基质施入不同量S后pH值的变化规律。[结果]6种基质pH值的降低主要发生在施S后45 d之内,施S后75~81 d pH值基本达到相对稳定状态,以后随着时间的推移,pH值有小幅度的波动;6种基质中,基质A、B的酸缓冲性最强,基质C较强,其余基质较弱;随着施S量的增大,基质pH值降低幅度逐渐减小。[结论]该研究结果为棕壤地区越橘栽培土壤的改良和pH值调节提供了依据。

Study on Acidic Bufer Capacity and Adjustment about pH Value in Several Kinds of Blueberry Media

[Objective] The research aimed to ascertain the fertilization time and optimum contents of sulfur added in different media.[Method] The change of pH value of CK(garden soil),A [V(garden soil)∶V(peat)=1∶1],B(peat),C[V(garden soil)∶V(rotten leaf soil)=1∶1],D[V(peat)∶V(vermiculite)=1∶1]and E[V(peat)∶V(rotten leaf soil)∶V(vermiculite)∶V(other materials)=3∶3∶3∶1] after the different contents of sulfur added in protected culture were studied.[Result] The most rapid decrease in pH occurred during 45 days after the sulfur added.In general,pH reached near-equilibrium values within 75 to 81 days,although pH continued to slightly fluctuate thereafter.Acidic bufer capacity of media A and media B was the strongest,and media C was strong,other media was weaker in six kind of media.Media pH was influenced by sulfur quantity.Media pH was reduced with the increase of sulfur quantity.[Conclusion] The research provided a scientific basis for cultivating soil improvement and adjustment of pH value of blueberry in brown soil area.