CHAI Zhong-ping,WANG Xue-mei,SUN Xia,et al.Influence of Photosynthetic Characteristics on Fruit Setting Stage of Korla FragrantPear Under Different Element Deficiency Treatments[J].Northern Horticulture,2013,37(02):15-19.
不同缺素处理对香梨坐果期光合特性的影响
- Title:
- Influence of Photosynthetic Characteristics on Fruit Setting Stage of Korla FragrantPear Under Different Element Deficiency Treatments
- 文章编号:
- 1001-0009(2013)02-0015-05
- Keywords:
- Korla fragrant pear; element deficiency; fruit setting stage; photosynthetic characteristics
- 分类号:
- S 661.2
- 文献标志码:
- A
- 摘要:
- 在田间条件下,利用CIRAS-2型光合仪研究了氮、磷、钾不同缺素处理对库尔勒香梨坐果期光合特性日变化的影响。结果表明:香梨叶片净光合速率日变化表现为双峰曲线,具有光合“午休”现象。气孔导度和气孔限制值的日变化与净光合速率日变化基本保持一致,呈双峰型。胞间CO2浓度日变化与净光合速率相反,呈双谷型。蒸腾速率日变化曲线呈单峰型,水分利用效率日变化则呈单谷型。施肥对香梨叶片的叶绿素含量、叶面积指数和光合特性均有显著影响。不同缺素处理下,香梨叶片叶绿素含量和叶面积指数施肥效应均表现为N>P>K。光合特性施肥效应各不相同,净光合速率K>P>N,蒸腾速率N>P>K,气孔导度K>N>P,水分利用效率N>K>P。
- Abstract:
- The diurnal variation curves of photosynthetic characteristics of fruit setting stage of Korla fragrant pear under different element deficiency were measured by portable photosynthesis system CIRAS-2 in the field conditions.The results showed that the diurnal variation curves of Pn of Korla fragrant pear presented double-apex curves,and had a phenomenon of photosynthetic ‘noon breaking’.The diurnal variation curves of Gs and Ls were the same as Pn,they also showed double-apex curves.The diurnal variation curves of Ci were contrary with Pn,they showed double-valley curves.The diurnal variation curves of Tr presented single-apex curves,but the diurnal variation curves of WUE showed single-valley ones.It could cause obvious impacts on Chl content,LAI and photosynthetic characteristics of Korla fragrant pear.Under different element deficiency,the roles of fertilizer N,P and K to Chl content and LAI of Korla Fragrant Pear were in order of N>P>K.The photosynthetic characteristics were different,the role of fertilizer N,P and K to Pn of Korla Fragrant Pear leaves was in order of K>P>N,Tr of Korla Fragrant Pear leaves was in order of N>P>K,Gs of Korla Fragrant Pear leaves was in order of K>N>P,WUE of Korla Fragrant Pear leaves was in order of N>K>P.
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备注/Memo
第一作者简介:柴仲平(1974-),男,甘肃永昌人,博士,副教授,研究方向为土壤质量及植物营养。E-mail:zhongpingchai@yahoo.com.cn.