棉花化学杀雄剂1号对棉花吸收矿质营养元素的影响

The Effect of Novel Chemical Gametocide No. 1 on the Absorption of Mineral Elements in Cotton

棉花叶片喷施化学杀雄剂１号后，叶片中Ｃａ２＋、Ｍｎ２＋、Ｆｅ２＋的含量在 ０～３ｄ内有较大幅度下降，３～７ｄ内有较小幅度上升，第二次用药后的变化趋势与第一次用药类似，１２ｄ后Ｍｎ２＋下降了２５％，Ｆｅ２６＋下降了２３％，Ｃａ２＋下降了４０％；棉叶中Ｍｇ２＋、Ｚｎ２＋及总氮（Ｎ）的含量受杀雄剂的影响不明显；Ｂ的含量在０～５ｄ内单调下降，后趋于稳定。在杀雄剂中加入金属离子（Ｚｎ２＋、Ｃｕ２＋、Ｍｎ２＋、Ｍｇ２＋）后，棉叶和整株中Ｂ、Ｎ的含量提高了；棉叶中Ｃａ２＋的含量无提高的趋势；棉叶中Ｍｎ２＋的含量在０～３ｄ内明显上升，３～７ｄ内又明显下降。在杀雄剂中加入 Ｂ，有利于提高棉叶中 Ｆｅ２＋和Ｃａ２＋的含量。

The effect of novel chemical gametocide No. 1 on the absorption of mineral elements in cotton was studied from June to July in 1999. The material of experiment was variety Chuan Pei Ⅱ at flowering time. The results of experiment showed that the contents of Ca2+, Fe2+ and Mn2+ in leaves decreased obviously during 0-3d and increased slightly from 3 to 7d after treatment with chemical gametocide. The similar result was obtained following the second spray of chemical gametocide. After 12d, contents of Mn2+, Fe2+ and Ca2+ were decreased by 25%, 23% and 40%, respectively. The gametocide No. 1 has little effect on the content of Zn2+, Mg2+ and total N in leaves, but it obviously decreased B content in leaves. The content of B decreased by 40% after 5d. When cotton plants were sprayed with the mixture of gametocide and metal ions (Zn2+ and Mg2+ and Cu2+ and Mn2+), the content of Ca2+ in leaves also decreased obviously. The content of Mn2+ in leaves increased obviously during 1-3d and decreased during 37d obviously. Compared with the treatment, the mixture of chemical gametocide and mental ions increased B and total N contents both in leaves and plants, the mixture of chemical gametocide and B increased the contents of Fe2+ and Ca2+ in leaves.