论文总字数：22112字

目 录

摘要： 2

Abstract : 3

1.前言： 4

2.材料和方法 5

2.1 植物材料和生长条件 5

2.2 测量和收获 6

2.2.1 作物形态特征的测量 6

2.2.2 比叶重的测量 6

2.2.3 冠层PPFD分布测量 6

2.2.4 叶片光合作用光响应曲线的测量 7

2.2.5 叶绿素荧光测量 7

2.2.6 叶片叶绿素含量的测定 7

2.2.7 叶片解剖分析 7

2.3 统计分析 8

2.3.1 作物光合作用计算 8

3.结果和分析 8

3.1 香菇草在不同的散射辐射比例处理下的形态 8

3.2 比叶重分析 10

3.3 香菇草在不同的散射辐射比例处理下的光响应曲线 11

3.4 香菇草的叶绿素荧光参数 12

3.5 香菇草在不同的散射辐射比例处理下的叶绿素含量 12

3.6 香菇草解剖分析 13

3.7 光合有效辐射PAR值分析 14

4.讨论 15

5.结论 16

参考文献 16

致谢 20

香菇草表型可塑性对散射辐射比例的响应特征

阿力木江.阿布都西库尔

，China

Abstract : In this experiment, potted experiment was carried out on the experimental material of Hylococcus vulgaris at the Agricultural Meteorological Experiment Station (N32°05', E118°62') of Nanjing University of Information Science and Technology. The phenotypic plasticity of Hylococcus vulgaris on scattered radiation was studied. Hylococcus vulgaris seedlings with the same growth were grown in three growth chambers with semi-enclosed light-impermeable compartments (90cm x 90cm x 135cm, length x width x height) and treated with three light direct scattering ratios (20%, 40%, 70%). Four weeks later, through systematically studying the light response curves, fluorescence values, chlorophyll content, leaf anatomy, and color differences of the three groups of Hylococcus vulgaris, the differences in the direct scattering ratio of Hylococcus vulgaris in this period of time were obtained. The results showed that under certain light intensity conditions, the greater the proportion of scattered light, the more favorable the growth of Hylococcus vulgaris. When the scattering ratio increases, the leaf number, plant height, root length, specific leaf weight and other morphological characteristics of Hylococcus vulgaris increased. The higher the net photosynthetic rate Pn, the stomatal derivative Gs, the fluorescence parameter value, the chlorophyll content, the palisade tissue thickness and a series of related parameters also increase with the increase of the scattering ratio; accordingly, the utilization efficiency of the leaf light energy increases. The more the dry matter accumulated, the Hylococcus vulgaris grows stronger. When the light intensity is too large, the net photosynthetic rate and the stomatal derivative are found to have decreased. Therefore, Hylococcus vulgaris is suitable for the environment where the light energy is sufficient and the direct light ratio is low (cloudy weather).

Keywords：Hydrocotyle vulgaris；diffuse radiation；photosynthetic rate；morphological character

前言：

香菇草 (Hydrocotyle vulgaris)，又称铜钱草、南美天胡荽。原产于欧洲，北美洲南部及中南美洲地区，我国引种栽培^[1]。是一种小型的多年生水生草本植物，生长迅速，成形较快，繁殖能力强，外形美观，国内多用作观赏植物，常作为水体岸边丛林植、片植，是庭院水景造景，尤其是景观细部设计的好材料，在南方一年四季都能生长^[2]。

剩余内容已隐藏，请支付后下载全文，论文总字数：22112字