Influence of Photosynthetic Characteristics on Fruit Setting Stage of Korla FragrantPear Under Different Element Deficiency Treatments(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:

2013年02期

Page:

15-19

Research Field:

Publishing date:

Info

Title:

Influence of Photosynthetic Characteristics on Fruit Setting Stage of Korla FragrantPear Under Different Element Deficiency Treatments

Author(s):

CHAI Zhong-ping¹; WANG Xue-mei²; SUN Xia¹; JIANG Ping-an¹; SHENG Jian-dong¹; LU Xiu-wen¹

1.College of Pratacultural and Environmental Science，Xinjiang Agriculture University，Urumqi，Xinjiang 830052；

2.College of Geography Science and Tourism，Xinjiang Normal University，Urumqi，Xinjiang 830054

Keywords:

Korla fragrant pear; element deficiency; fruit setting stage; photosynthetic characteristics

PACS:

S 661.2

DOI:

-

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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