朝阳半干旱区气候因子对大枣生长发育的影响

Effects of Climatic Factors on Growth of Ziziphus jujubain Semiarid Region of Chaoyang

通过对朝阳半干旱区大枣资源状况及影响枣树生长发育相关因子进行的调查分析,结果表明,影响朝阳地区枣树产量主要因子有花期降水、温度和光照;同一株树的东南、西南侧的结果率、坐果率高,西北、东北侧的结果率、坐果率低;同一结果枝,其1～3节结果率、坐果率低,4～8节结果率、坐果率高;当气温稳定在22～24℃时,降水量增大,产量也随之提高,朝阳市年平均产量为2 085～2 170 t.

Status of Ziziphus jujuba resource and related factors of growth for Ziziphus jujuba were investigated in semiarid region of Chaoyang.Result shows that:the main factors affect the yield of Ziziphus jujuba in Chaoyang district are precipitation at florescence,temperature and light;fruiting rate & setting rate in southeast,southwest side on the same tree are higher;fruiting rate &setting rate in northwest,northeast side are lower;fruiting rate & setting rate are lower from the first to the third branch on the same seed-bearing branch;fruiting rate &setting rate are higher from the fourth to the eight branch;when the temperature stabilized at 22-24℃,the precipitation increases,yield also increase;the average annual yield in Chaoyang City are 2 085-2 170t.