CHAI Zhong-ping,WANG Xue-mei,SUN Xia,et al.Influence of Different Fertilization Treatments on Photosynthetic Characteristics of Fruit Enlargement Stage of Korla Fragrant Pear[J].Research of Soil and Water Conservation,2013,20(02):151-155.
不同施肥处理对香梨膨果期光合特性的影响
- Title:
- Influence of Different Fertilization Treatments on Photosynthetic Characteristics of Fruit Enlargement Stage of Korla Fragrant Pear
- Keywords:
- Korla fragrant pear; fertilization; fruit enlargement stage; photosynthetic characteristics
- 分类号:
- S661.2
- 摘要:
- 在田间条件下，利用CIRAS-2型光合仪对不同施肥处理的库尔勒香梨膨果期光合特性日变化进行了测定。结果表明：香梨叶片净光合速率日变化表现为双峰曲线，峰型较弱或不明显，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，气孔导度峰型明显而气孔限制值峰型较弱。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都有显著影响。不同施肥处理下，香梨叶片的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，净光合速率与水分利用效率表现为：K > P > N，蒸腾速率表现为：P > N > K，气孔导度表现为：K > N > P。
- Abstract:
- The diurnal variation curves of photosynthetic characteristics of fruit enlargement stage of korla fragrant pear under different fertilization treatments were measured by portable photosynthesis system CIRAS-2 under the field conditions. The results showed that the diurnal variation curves of Pn of Korla Fragrant Pear presented double-apex curves, double-apex was weak or not obvious, and had a phenomenon of photosynthetic ‘noon breaking’. The diurnal variation curves of Gs and Ls were same as Pn, they also showed double-apex curves, but the double-apex of Gs was obvious, the double-apex of Ls was weak. 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 chlorophyll content, LAI and photosynthetic characteristics of Korla Fragrant Pear. Under different fertilization treatments, the roles of fertilizer N, P and K to chlorophyll content and LAI of Korla Fragrant Pear were in the order of N > P > K. The photosynthetic characteristics were different, the roles of fertilizer N，P and K in Pn and WUE of Korla Fragrant Pear leaves were in the order of K > P > N, Tr of Korla Fragrant Pear leaves was in the order of P > N > K, and Gs of Korla Fragrant Pear leaves was in the order of K > N > P.
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备注/Memo
收稿日期:2012-08-16;改回日期:2012-09-28。
基金项目:自治区“十二五”科技计划项目“果园土壤肥力提升与果树产量、品质调控研究”（201130102-2）；土壤学自治区重点学科资助
作者简介:柴仲平(1974-),男,甘肃永昌人,博士研究生,副教授,主要研究方向为土壤质量、植物营养。E-mail:zhongpingchai@yahoo.com.cn
通讯作者:盛建东(1970-),男,甘肃秦安人,博士,教授,主要研究方向为土壤质量空间变异和养分资源高效利用。E-mail:sjd_2004@126.com