CAJ | 학술논문

为探索陕北黄土丘陵区梨枣的抗旱性与耐旱能力，以大规格盆栽梨枣（ Ziziphus jujuba Mill ．cv ．Lizao ）2年生苗木为试验材料，在连续不供水情况下研究了梨枣的萎蔫到致死过程。依据干旱缺水后枣树生长衰退过程中的特征将枣树萎蔫致死分为：暂时萎蔫、初始萎蔫、表征永久萎蔫及耐旱致死四个阶段。结果表明：梨枣的初始萎蔫系数在2．017％～3．054％之间，平均为2．494％；表征永久萎蔫系数在1．199％～1．998％之间，平均为1．489％，永久萎蔫系数在1．250％～1．489％之间；耐旱致死点为1．250％，致死时间为135±11 d。试验结果证明枣树是一种十分抗旱的树种，在半干旱黄土丘陵区枣树不会出现干旱致死。
위탐색협북황토구릉구리조적항한성여내한능력，이대규격분재리조（ Ziziphus jujuba Mill ．cv ．Lizao ）2년생묘목위시험재료，재련속불공수정황하연구료리조적위언도치사과정。의거간한결수후조수생장쇠퇴과정중적특정장조수위언치사분위：잠시위언、초시위언、표정영구위언급내한치사사개계단。결과표명：리조적초시위언계수재2．017％～3．054％지간，평균위2．494％；표정영구위언계수재1．199％～1．998％지간，평균위1．489％，영구위언계수재1．250％～1．489％지간；내한치사점위1．250％，치사시간위135±11 d。시험결과증명조수시일충십분항한적수충，재반간한황토구릉구조수불회출현간한치사。
In order to explore the drought -resistant ability of pear jujube ( Ziziphus jujuba Mill .cv .Lizao ) in Loess Plateau region of northern Shaanxi ,a pot experiment was conducted with 2-year old seedlings as the material ,and its process from wilting to death was investigated under continuously unirrigated condition .The degenarative process of pear jujube under unirrigated condition was classified into four periods :temporary wilting ,initial wilting ,apparent permanent wilting and drought caused death . The results showed that the initial wilting coefficient of pear jujube was between 2 .017% and 3 .054% with an average of 2 .494% ;the apparent permanent wilting coefficient was between 1 .199% and 1 .998% with an average of 1 .489% ;the permanent wilting coefficient was between 1 .250% and 1 .489% ;the drought lethal point was 1 .250% and the lethal time was 135 ± 11 days .It was concluded that pear jujube was a kind of drought-resistant fruit tree ,and it could not become dead of drought in semi-arid loess hilly regions .