|Table of Contents|

EFFECT OF WATER-POTASSIUM COUPLING ON DRY MATTER ACCUMULATION AND YIELD OF SOYBEAN(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2007年06期
Page:
862-867
Research Field:
Publishing date:

Info

Title:
EFFECT OF WATER-POTASSIUM COUPLING ON DRY MATTER ACCUMULATION AND YIELD OF SOYBEAN
Author(s):
YAN Chun-juan1; 2; HAN Xiao-zeng2; WANG Shou-yu2; WANG Shu-qi2; LI Hai-bo2
1. Northeast Agricultural University，Harbin 150030;
2.Northeast Institute of Geography and Agricultural Ecology，CAS，Harbin 150081
Keywords:
Soybean; Water-potassium coupling; Dry matter accumulation; Yield
PACS:
S565.1
DOI:
10.3969/j.issn.1000-9841.2007.06.011
Abstract:
Pot experiments were carried out to study the effect of water-potassium coupling on dry matter accumulation and yield of soybean.The aim is to provide better planting measure for soybean production in Heilongjiang province.In this experiment，five water supply levels and three potassium fertilizer application levels were included in terms of soil water content controlled at vegetative stage（V2-R1），flowering stage（R1-R3） and podding stage（R3-R5），respectively.The results showed that water supply had more significant effect on dry matter weight and root to shoot ratio than that of potassium fertilizer application.The sufficient soil moisture enhanced the accumulation of dry matter，while root to shoot ratio decreased with the increment of soil moisture content.The yield increased with accumulation of dry matter，however，excessively biomass resulted in yield decline.When soil water content was controlled during vegetative stage of soybean，the effect of different factors in yield was potassium fertilizer > water> water potassium fertilizer；when the soil water content was controlled during flowering stage and podding stage，the yield difference was mainly attributed to the water supply，while water potassium fertilizer interaction only played a little role and potassium fertilizer almost had no effect.The yield was sensitive to water supply during flowering and podding stage，in which the sensitivity was found podding stage（R3-R5）>flowering stage（R1-R3）>vegetative stage（V2-R1）；the contribution of water supply to the yield formation was more central than potassium fertilizer application in light of controlling soil water at the same growth stage.Both drought and water logging conditions were found to influence the yield of soybean，in which drought condition more significantly reduced the yield.

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Last Update: 2014-10-19