ZHANG Ning-ning,LIU Pu-ling,WANG Shuan-quan,et al.Study on Photosynthetic Characteristics of Different Cash Crops[J].Research of Soil and Water Conservation,2012,19(03):269-273.
黄土丘陵区不同经济作物光合作用特性研究
- Title:
- Study on Photosynthetic Characteristics of Different Cash Crops
- Keywords:
- cash crops; photosynthesis; environmental factor; diurnal change
- 分类号:
- Q945.11
- 摘要:
- 为研究延安燕沟流域5种传统作物的光合作用特性及其与环境因子的相关关系，运用美国产Li-6400便携式光合作用系统对5种作物的光合特性和环境因子进行了测定，结果表明：（1）西葫芦（Cuourbita papo）和甘蓝（Brassica olerarea）的净光合速率日变化呈“单峰型”，即没有光合“午休”现象，而茄子（Solanum melongena L.）、黄瓜（Cucumis satovus L.）和甜瓜（Cucumis melo L.）均呈现明显“双峰型”特征，光合“午休”现象明显；（2）5种作物中甜瓜叶片的蒸腾速率最大，其他依次为西葫芦、甘蓝、黄瓜、茄子；（3）相对于甘蓝而言，茄子和黄瓜的气孔导度日变化相对平缓；（4）甘蓝的胞间CO2浓度呈“双峰型”，茄子、黄瓜和甜瓜均呈现先下降后上升的趋势，即“V”型，西葫芦呈上升-下降-上升趋势，即“N”型；（5）5种作物的光合有效辐射（PAR）和相对湿度（RH）与净光合速率（Pn）均呈极显著正相关（p<0.01）。
- Abstract:
- The photosynthetic characteristics of five traditional crops in Yangou Basin,Yan’an city and its correlation between the environmental factors were studied. The photosynthetic characteristics and environmental factors of five kinds of crops were investigated using Li-6400 portable photosynthesis system. The results showed: (1)the diurnal changes of Pn of Cucurbita pepo L. and Brassica oleracea were a single-peak curve which meant they didn’t have the phenomenon of ‘midday depression of photosynthesis’, and the diurnal changes of Pn of Solanum melongena L., Cucumis melo and Cucumis sativus Linn showed a typical double－peak curve with a visible ‘midday depression of photosynthesis’; (2) the diurnal changes of Tr was in the order of Cucumis melo>Cucurbita pepo L.>Brassica oleracea>Cucumis sativus Linn>Solanum melongena L; (3) the diurnal changes of Gs of Solanum melongena L.and Cucumis sativus Linn were flater than Brassica oleracea; (4) the diurnal changes of Ci of Brassica oleracea showed a double-peak curve, a ‘V-type’ curve was showed in Solanum melongena L., Cucumis sativus Linn and Cucumis melo, a ‘N-type’ curve was showed in Cucurbita pepo L.; (5)there was a significant (P<0.01) positive relationship between the Pn, PAR and RH in the five crops.
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备注/Memo
收稿日期:2011-11-3;改回日期:2011-12-26。
基金项目:国家科技支撑项目农田水土保持关键技术研究与示范（2001BAD31BO1）；国家重点基础研究发展计划（2007CB407205）
作者简介:张宁宁（1986- ），女，山西长治人，硕士研究生，主要从事水土保持与生态环境演变。E-mail：zhangningning1986@163.com
通讯作者:王栓全（1953- ），男，教授，硕士生导师，主要从事旱地农业研究。E-mail：wangshq5310@nwsuaf.edu.cn