|Table of Contents|

Influences of Planting Density on Agronomic Traits and Spatial Distribution of Yield Components Across Main Stem in Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年06期
Page:
936-942
Research Field:
Publishing date:

Info

Title:
Influences of Planting Density on Agronomic Traits and Spatial Distribution of Yield Components Across Main Stem in Soybean
Author(s):
WANG Cheng1; 2; LIU Bing2; JIN Jian2; LIU Ju-dong2; ZHANG Qiu-ying2; LIU Xiao-bing2; LI Wen-bin1; S J Herbert3
1 Soybean Research Institute，Northeast Agricultural University，Harbin 150030，Heilongjiang；
2Northeast Institute of Geography and Agroecology，CAS，Harbin 150081，Heilongjiang，China；
3University of Massachusetts，Amherst，MA，01003，USA
Keywords:
Soybean; Planting density; Agronomic traits; Yield components; Spatial distribution
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2008.06.0936
Abstract:
Effects of planting densities on agronomic traits and spatial distribution of yield components across the main stem in soybean were investigated in field conditions with three soybean genotypes.Plant height increased with the density increased，while main stem node number，basal node diameter and dry weight of individual stem declined.Planting density had notable influence on pod number，seed number and yield of individual plant.Compared with the medium density，the lower density increased the individual plant yield of H339，HN35，and KN18 by 80.3%，55.4% and 12.6%，seperately;while the higher density deduced the individual plant yield of H339;HN35 and KN18 by 57.4%，24.7% and 53.6%.Planting density had certain influence on seed number per pod and seed weight in each node，and the effect varied among genotypes.The spatial distribution of pod number，seed number and seed weight across the main stem in three genotypes showed the arc shape from top to bottom，i.e.more in middle part and fewer in top or bottom，and the distribution of seed number per pod and single seed weight was almost like “Linear”.With density decreased，pod number,seed number and seed weight in each node all increased in the three genotypes but had some difference in top，medium and bottom layer with different genotypes.The cultivar KN18 had greater stability in the seed number per pod and single seed weight，followed by cultivar HN35，while line H339 was not stable.The mathematics expression with increased yield and inhibited individual yield by increased density was “Y n+1= Y n+ YD－YG”，this expression existed a balance point which could be used as an indicator for estimating suitable density for the high yield population in soybean.

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Last Update: 2014-10-04