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为了使花棒更新复壮后及早达到一定的生长量,研究了不同平茬高度对死亡率、枝条生长和根系生长的影响。结果表明:10a生花棒平茬高度10、20、30、40cm均降低了死亡率,提高了枝条生长量和根系数量,其中平茬高度20cm处理的死亡率最低,为2.60%,较对照(CK)降低了10.23个百分点,萌枝数、新梢长、新梢粗、冠幅和直径≤2mm、2~10mm、≥10mm根系数量均最高,分别为21.85条/株、192.32cm、1.56cm、1.92m、148.32条/株、60.34条/株和26.08条/株,较对照(CK)分别提高了79.46%、106.29%、64.21%、54.84%、104.13%、111.65%和140.15%,且生长势表现为旺盛,差异均达到极显著水平(P<0.01)。因此,建议多年生花棒采用20cm平茬来更新复壮,提高防沙固沙能力。
In order to achieve a certain amount of growth as soon as possible, the effects of different stubble height on mortality, shoot growth and root growth were studied. The results showed that: 10d, 30cm and 40cm, the mortality of 10d, 30cm and 40cm were reduced, and the growth and root number of shoots were increased. The mortality of stubble height 20cm was the lowest, 2.60% ) Decreased by 10.23 percentage points. The root number of shoots with branches, shoots, shoots, crown width and diameter ≤2mm, 2 ~ 10mm and ≥10mm were the highest, which were 21.85 / 192.22cm, 1.56cm, The average growth rate was 1.92m, 148.32 / 60.34 / 26.08 / plant, increased by 79.46%, 106.29%, 64.21%, 54.84%, 104.13%, 111.65% and 140.15% Performance was strong, the differences were reached a significant level (P <0.01). Therefore, the proposed perennial spent 20cm stubble stubble to renew and rejuvenate, improve sand and sand-fixing capacity.