北疆棉花不同品种叶片营养元素含量变化及其与产量的关系

研究了北疆棉花不同品种花铃期、吐絮期叶片N、P、K、B、Cu、Zn元素含量及其与棉花产量的关系。结果表明,不同品种花铃期养分含量除P以外均存在显著差异:石杂2号叶片营养元素含量最高,万氏217最低;石杂2号和新陆早26号棉株叶片的N、K、Cu、Zn和B的含量显著高于标杂A1和新陆早33(P0.05),而标杂A1和新陆早33的含量变化基本一致。吐絮期不同品种叶片N、P、K和B含量无显著差异,但Cu、Zn含量差异显著。花铃期棉花叶片N、K与子棉产量、皮棉产量显著相关,花铃期和吐絮期B元素的含量与子棉、皮棉产量极显著相关。

Nutrition Elements Content in Leaves and Its Correlation to Yield of Different Cotton Cultivars in Northern Xinjiang

 The purpose of this study was to compare the nutrition elements content of N,P,K,B,Cu, and Zn in leaves and to analyze its correlation to yield of different cotton cultivars in northern Xinjiang. The results showed that there were significant differences in the content of N, K, B, Cu , and Zn in leaves at flowering stage among different cultivars. All the element content of Shiza 2 plants was the highest , that of Wanshi 217 was the lowest. The content of of N, K, B, Cu, and Zn in leaves of Shiza 2 plants and Xinluzao 26 plants were higher than that of Biaoza A₁ and Xinluzao 33 at flowering stage ( P <0.05), respertirely, and the difference between content of Biaoza A₁ and Xinluzao 33 was not significant. There was no significant difference in the element content of N,P,K, and B in different cultivars at boll opening stage. But there were significant differences in the content of Cu, Zn. Both seed cotton yield and lint yield were significantly positive related to N and K content in leaves at flowering stage. The positive correlation of cotton yields and the B content in cotton leaves at flowering and boll opening stages were highly significant.