|Table of Contents|

EFFECT OF DIFFERENT PHOSPHORUS REGIMES ON ROOT MORPHOLOGICALCHARACTERISTICS OF SOYBEAN SEEDLING(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2006年04期
Page:
360-364
Research Field:
Publishing date:

Info

Title:
EFFECT OF DIFFERENT PHOSPHORUS REGIMES ON ROOT MORPHOLOGICALCHARACTERISTICS OF SOYBEAN SEEDLING
Author(s):
Jin Jian 1; 2 　Wang Guanghua 1Liu Xiaobing1　Chen Xueli 1Li Xingguo 3
(1. Key lab of black soil , Northeast Institute of Geography and Agro-ecology , Chinese Academyof Science , Harbin 150081;2. Graduate School of the Chinese Academy of Sciences ,Beijing 100039;3. Northeast Agricultural university , Harbin 153000)
Keywords:
Soybean; Phosphorus ; Root morphology
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2006.04.0360
Abstract:
The response of soybean root morphology to different phosphorus regimes was researched bya pot experiment. The results showed that phosphorus significantly increased root dry weight , rootlength , root surface area and root volume. In the treatment of low phosphorus, i. e. P50(50 mg /kg), rootdry weight , root length, root surface area and root volume were 88. 0%, 97. 1%, 101. 7% and 104. 9%higher than P0 (0 mg /kg)treatment. This indicated that suitable phosphorus may accelerate root grow thresulting in root exploring more soil space for nutrient absorption. The variation of root morphology byphosphorus was root mass and root length, rather than root percentage at different ranges of root diame-ters. The root morphology in P 1 00(100 mg /kg)treatment was worse than that in P50 treatment , sugges-ting that there was a threshold for phosphorus application to stimulate root growth, therefore , too muchphosphorus may limit root growth but enhance it as expect.

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