叶面喷施亚硒酸钠对葡萄果实品质及叶片衰老的影响

以3年生露地栽培葡萄户太8号为试材,采用不同浓度、不同时期叶面喷施亚硒酸钠的方法,探究提高葡萄果实硒含量方法及其延缓叶片衰老的效应。结果表明,喷硒后新抽生出副梢新叶中的硒含量与老叶中硒含量呈高度正相关(r=0. 99),硒在葡萄植株内具有移动性,可重复利用。不同浓度处理以50 mg/L亚硒酸钠处理后的果实品质最好;不同时期处理下始着色期处理后的果实品质最好。50 mg/L亚硒酸钠处理后延缓叶片衰老效果最明显。叶面喷施亚硒酸钠可有效提高葡萄果实含硒量从而提高果实品质,有效提高叶片叶绿素含量从而增加叶片光合量进一步延缓叶片衰老。

Effect of foliar spraying Na2SeO3 on the fruit quality and leaf senescence of grapevine

The experiment was to clarify the effect of different concentrations and foliar spraying period of Na2SeO3 to grape leaves on fruit quality and leaf senescence,using 3 years old Hutai 8 grape as the experimental material.The results indicates that Se has mobility in grape,and it is reusable.The Se contents in the younger leaves are positively correlated with those in the old leaves after Se spraying (r=0.99).The fruit quality of 50 mg/L Na2SeO3 treatment is the best,and the senescence of functional leaves are postponed.Among the treatments of different Se spraying periods,the best fruit quality occurs in the initial coloring period.Fertilizer Na2SeO3 spraying effectively increases the Se content of grape fruits and improves fruit quality and the chlorophyll content of leaves which can improve photosynthesis thus can delay leaf senescence.