摘要：花生是我国一种重要的经济作物，其产量和品质与光合强度密切相关。本试验于2017年在江苏省农科院试验田内进行，供试花生品种为泰5、中16、花693、花702、花713、花719，共六个。采用便携式光合仪LI-6800待花生长至8叶期时测量净光合速率（Pn）。应用 3种常用的光响应模型对6个花生品种叶片的光合光响应曲线进行了拟合。研究数据显示，修正直角双曲线模型的拟合效果较好，能够较好的反映出植物在不同光照条件下的净光合速率的变化。最大净光合速率以品种“花719”最高，其次是品种“花702”和品种“中16”，而其他三个品种则表现较差。品种“花719”和品种“花702”的饱和光强较其他品种更高，品种“中16”的暗呼吸速率较低。结果表明：在本试验6个花生品种中，表现最好的是品种“花719”，其次是品种“花702”、品种“中16”，均能较好地在高光强下进行光合。而品种“花713”的光合特性较差，光合产物积累较少，同时易发生消耗。

关键词：花生；光合作用；光响应曲线；光合速率

Character Analysis of the Photosynthesis-light density Simulative Curves among Various Peanut Varieties

Abstract：Peanut is an important economic crop in China, and its output and quality are closely related to photosynthetic intensity. This experiment was conducted in the experimental field of Jiangsu Academy of Agricultural Sciences in 2017. The tested peanut varieties were Tai 5, Zhong 16, 693, 702, 713, and 719, a total of six. The net photosynthetic rate (Pn) was measured using the portable photosynthesis instrument LI-6800 at the time of flower growth to the 8-leaf stage. Three common light response models were used to fit the photosynthetic light response curves of six peanut varieties. The research data show that the correction of the right-angle hyperbola model is better, and it can better reflect the changes of the net photosynthetic rate under different light conditions. The maximum net photosynthetic rate was the highest for the variety “719”, followed by the “702” variety and the “middle 16” variety, while the other three varieties performed poorly. The saturated light intensity of variety "719" and variety "702" is higher than that of other varieties. The dark respiration rate of "Zhong 16" is lower. The results showed that among the six peanut varieties in this experiment, the best performance was the variety “719”, followed by the variety “702” and the variety “middle 16”, all of which could perform photosynthesis under high light intensity. However, the photosynthetic characteristics of variety "713" were poor, photosynthetic products accumulated less, and it was prone to consumption.

Key words: Peanut; photosynthesis; light response curve; photosynthetic rate

目  录

摘要1

关键词1

Abstract1

Key words1

引言 1

1材料与方法3

1.1试验设计 3

1.2光响应数据的测定3

1.3光响应曲线模型3

1.3.1直角双曲线模型4

1.3.2非直角双曲线模型4

1.3.3双曲线修正模型4

2结果与分析4

2.1光响应曲线的拟合及其比较4

2.2不同品种间花生光响应曲线参数比较5

2.3不同花生品种的光合特征6

3讨论 7

致谢8

参考文献8

不同花生品种的光响应曲线特征分析

我国的花生栽培历史悠久，开始仅在沿海区域栽培，因为其适应地域广，拥有较高的营养价值。后来，其他地区也相继栽培，种植面积越来越广，目前全国各地均有花生种植[1]。由于栽培面积不断增加，栽培技术不断革新，适应各个地区栽培条件的品种也慢慢被选育出来，花生逐渐变成了我国重要的经济作物之一。

大多数土壤都可供花生生长，除了盐碱地之外，其余各种土壤均可栽培，平原以及山区土地最为适宜。在实际生产中总是将花生种在比较贫瘠的土壤上，例如沿江两岸的冲积砂土、砾石土。花生对光有很好的适应性。从南方热带—直到北方寒温带，各个地区均有花生栽培。整个分布地区的地理、气候因素非常复杂，光照条件均不相同，充分体现了花生对光照的广泛适应性[2]。