|Table of Contents|

Effects of Triiodobenzoic Acid (TIBA) on Growth and Lodging Rate of Different Shade-tolerant Soybean During Vegetative Stages Under Relay Intercropping(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2019年04期
Page:
570-575
Research Field:
Publishing date:

Info

Title:
Effects of Triiodobenzoic Acid (TIBA) on Growth and Lodging Rate of Different Shade-tolerant Soybean During Vegetative Stages Under Relay Intercropping
Author(s):
GONG Wan-zhuo;  DU Cheng-zhang;  LONG Jue-chen;  WANG Ping;  CHEN Hong;  WANG Qiang;  ZHANG Ji-jun

(Research Institute of Characteristic Crops, Chongqing Academy of Agricultural Sciences, Chongqing 402160, China)
Keywords:
Soybean;  Relay intercrop;  Triiodobenzoic acid;  Shade-tolerant; Lodging rate
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2019.04.0570
Abstract:
Triiodobenzoic acid (TIBA) is an auxin transportation inhibitor, and can be used to inhibit apical growth. To study the effects of TIBA at early-seedling stages on growth and lodging of soybean, the experiment was conducted by spraying TIBA solution with different concentrations (50，100，150，200 and 250 mg?kg-1), and the water and soybean grown without shade were used as two controls. We measured the morphological of dry matter accumulation and lodging characteristics. The results showed that compared with those plants without shade, plant height increased significantly, while stem diameter, nodes, branches,SPADand dry mass accumulation reduced significantly, finally lodging rate increased significantly under shade. Under the treatments of spraying TIBA, plant height reduced, stem diameter and nodes didn’t change, branches increased, leaf area reduced,SPADdidn’t change, dry mass accumulation reduced, and the lodging rate reduced significantly. The appropriate concentration of TIBA solution applied on soybean seedling under relay intercropping was 50 to 100 mg?kg-1, and the concentration was correlated with shade tolerance of soybean variety. For shade-tolerant variety Nandou 12, the appropriate concentration of TIBA was 50 mg?kg-1, and for shade-sensitive variety, the concentration was 100 mg?kg-1. Although plant height and lodging could be reduced under the application of higher TIBA concentrations over 150 mg?kg-1, the dry matter accumulation could be inhibited, therefore the treatment of higher TIBA concentration was harmful for cultivating healthy seedlings.

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Last Update: 2019-07-25