丹玉13单交种在梨树县丰歉年的预测研究

Study on the Effects of Trace Element Zirconium on Tobacco Growth, Yield and Quality

摘要:

对梨树县1986~1996年间玉米丰歉定点定位的观测结果，采用相关分析和积分回归分析得出:在当地生产条件下，玉米产量波动幅度为25.8%，播种至成熟、出苗至成熟的积温利用率仅为92%和83%，致使产量与4~9月的气象要素不显著。玉米的干物质增长动态呈"S"变化过程，决定于丰歉年。丰年干物质积累速度快，歉年则相反。6月下旬、8月下旬和9月上旬干物质与产量呈显著正相关，可依此预测年成，同时明确了玉米高产栽培必需加强中前期的养分供应，才能进一步提高产量。

Abstract:

Both water cultures using diferent concentrations of Zro²⁺ and pot experiments were conducted to study the effects of trace element-Zirconium on tobacco growth, yield and quality. The result shows: (1)The trace element-Zirconium can obviously accelerate the growth of tobacco, the main reflections are that it can accelerate the root growth, strengthen the nutrien absorbtion and raise the plant height, leaf area, thickness and single leaf weight. (2)The yield of tobacco couldincrease highest by 30%. (3)Flue-cured tobacco leaf would turm orange, with sufficient tobacco oil, increased nicotine content and coordinated sugar and alkali. (4)The suitable range of trace element-Zirconium is 60～100 mg/L and the best is 80 mg/L.