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本研究从补钙入手,探索防治干烧心病的方法。用0.7％CaCl_2·2H_2O对和50ppmNAA混合液在大白菜结球期叶面喷洒5次,经8年试验,对大白菜干烧心病的相对防治效果达80％以上。 在此基础上,采用~(45)Ca示踪试验的方法对防病机理做了进一步研究。结果表明,无论从根部还是从叶部加萘乙酸对根部和叶部~(45)Ca的吸收和运转均具有促进作用,并且改变了其在大白菜植株内的分配规律。对照株单位干叶重dpm值自外向内呈下降趋势(130×10~3─60×10~3);用NAA处理株则相反,自外向内呈增加趋势(120×10~3─250×10~3),说明萘乙酸具有促进钙素向叶球中内部运转的功效。这种效果在贮藏期间仍能保持。另外,~(45)Ca向直接受到NAA处理部位的运转量有明显增高的趋势。这一结果为补钙防治干烧心病提供了理论依据。
This study started with calcium to explore ways to prevent and treat heartburn. The relative control effect on Chinese cabbage dried heart disease was over 80% after spraying with 0.7% CaCl 2 .2H 2 O and 50 ppm NAA on the foliage of Chinese cabbage at the heading stage for five times. On this basis, the mechanism of disease prevention was further studied by ~ (45) Ca tracer assay. The results showed that both NAA and NAA could promote the uptake and transport of ~ (45) Ca in roots and leaves, and changed its distribution in Chinese cabbage plants. The dry weight dpm value of the control plants showed a downward trend from the outside to the inside (130 × 10 ~ 3 ~ 60 × 10 ~ 3). On the contrary, the dA values of the leaves of the control plants increased from the outside to the inside (120 × 10 ~ 3 ─ 250 × 10 ~ 3), indicating that naphthaleneacetic acid has the effect of promoting the internal operation of calcitonin to the lobes. This effect can be maintained during storage. In addition, the activity of ~ (45) Ca in the area directly affected by NAA tended to increase significantly. This result provides a theoretical basis for calcium prevention and treatment of heartburn.