四川农业大学学报 ›› 1997, Vol. 15 ›› Issue (02): 211-217,262.doi: 10.16036/j.issn.1000-2650.1997.02.013

• 研究论文 • 上一篇    下一篇

薏苡叶片的生长与叶面积的研究

范巧佳, 吴卫, 袁继超   

  1. 四川农业大学农业科技学院, 雅安市 625014
  • 收稿日期:1996-12-23 出版日期:1997-06-30 发布日期:2017-03-07

STUDY ON THE LEAF GROWTH AND LEAF AREA OF JOB'S-TEARS

Fan Qiaojia, Wu Wei, Yuan Jichao   

  1. College of Agriculture, Sichuan Agricultural University/Yaan, Sichuan, China 625014
  • Received:1996-12-23 Online:1997-06-30 Published:2017-03-07

摘要: 本文以两个不同来源的品种为材料,分析了薏苡叶片的大小、叶面积的测定方法及叶面积的变化与组成,结果表明:薏苡叶片的大小因品种和着生部位(叶序)而异,一般中上部叶片较宽大,基部叶较短小;用长宽法测定叶面积的校正系数也因叶序不同而有一定差异,以中上部和基部叶较大,中下部叶较低,两品种的总平均为0.727;叶面积(Y)与叶片的长宽乘积(X1)和长宽比值(X2)呈极显著正相关,回归方程分别为Y=-0.286+0.7305X1和Y=-6.928+4.9268X2;薏苡一生中叶面积的变化呈一元三次曲线,大约在抽穗末期达最大值,一生都处于淹水条件下的单株叶面积和比叶面积均较低;薏苡在中后期分枝分蘖叶面积占全株的比重大,中上部主茎叶面积占主茎叶面积百分比较高。

关键词: 薏苡[45NL], 叶片[53CC, 67CC], 叶面积[45NE], 校正系数, 回归法

Abstract: The leaf size leaf area and leaf area measuring method of Job's-tears were studied. The results were shown as follows: The leaf length, width and thickness(SLA, specific leaf area) of Job's-tears varied with the varieties and the leaf position on the main stem. The medium-upper leaves on the main stem were usually larger and thicker than the basal ones. The value of K, the calibrated coefficient used to calculate the leaf area with the leaf length and width, varied with the leaf position on the main stem too. The average K of 0.727 was calculated with the two varieties experimented. There were signifficant correlationships between leaf area(Y) and leaf length×width(X1) and length/width(X2), and the regression equations of Y=-0.286+0.7305X1 and Y=-6.928+4.9268X2 were found, which could be used to calculate the leaf area. The curve of leaf area per plant in the all growth stage fitted in with cubic equation. The SLA and leaf area of the plants in the dry-farming field which were moistured within all growth stages were larger than those in the irrigated field keeping 3-6cm thickness of the water within all growth stages. The leaf area per plant was largely composed by the tiller leaves while the leaf area of the leaves on the main stem was largely composed by the medium-upper ones at the medium-late growth growth stage.

Key words: COIX·LACRYMA-JOBI, BLADES, LEAF AREA, REGRESSION METHOD, CALIBRATED COEFFICIENT

中图分类号: 

  • S567.219