红背菜生长动态与产量构成研究

本试验探讨了红背菜生长过程中的出叶速度、不同时期不同叶位叶重的变化、鲜重和干重增长、叶面积变化、叶片和叶柄的变化、叶片和叶柄的重量比例等。 红背菜出叶速度以8—20片叶长出最快,平均每两天约长1片新叶。最重叶的叶位随着生长而变化,对产量和质量影响较大的是第8—23叶位的叶。叶的鲜重和干重呈直线增加。红背菜扦插后40天左右叶数和叶面积增长较快,叶片的重量约为叶柄的8倍。

STUDIES ON THE GROWTH TRENDS AND YIELD COMPOSITION IN GYNURA BICOLOR DC.

Leafing rates, varitions of leaf weight, wet weight and dry weight of plant in different stage of Gynura were studied.The greater leafing rates was from 8th-20th leavies which were grew every two days. The greatest weight of varied according to growth, and what had the greatest influence was 8th-23th leaves. Wet and dry weight of leaf increased perpendicularly.Leafing after cuttaged. the plant grew rapidly in the spring, the number and size of leaf con-tiously increasing and more rapidly at 40 days later. Blades grew faster than stalks in all the stage. The weight of blades was about 8 times as much as that of stalks.