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.: Home > Advances in Crop Science and Technology > 2014 > Volume 2 Number 4 > Berger-Doyle J 1 , Zhang B 2 , Smith SF 1 and Chen P 1*

Planting Date, Irrigation, and Row Spacing Effects on Agronomic Traits of Food-grade Soybean

Berger-Doyle J 1 , Zhang B 2 , Smith SF 1 and Chen P 1*
1 Deptartment of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72701, USA 2 Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA 24060, USA
Abstract :

A niche market for food-grade soybean varieties has emerged in the United States in recent years. However, knowledge of optimal management practices for new varieties of food-grade soybean in the southern United States , is currently lacking. Therefore, the objectives of the study were: 1) to determine favorable production practices for current specialty soybean cultivars; 2) to determine heritability of major agronomic traits in multiple environments; and 3) to determine correlations among these traits in specialty soybean. Several agronomic traits of eight soybean genotypes,  representing  tofu,  natto,  and  conventional  varieties  currently  available  in  the  southern  United  States,  were assessed with three variables: planting date (April, May, and June), irrigation treatment (irrigated and dryland), and  row  spacing  (narrow  and  wide).  Yield,  seed  size,  maturity,  plant  height,  lodging,  shattering,  and  stand  count  were  measured  after  maturity.  Among  planting  dates,  the  May  planting  resulted  in  the  greatest  yield  and  height;  whereas varieties planted in April were the shortest and produced the lowest yield. June plantings resulted in longer days to maturity. Irrigation improved yield and extended days to maturity. Row spacing did not have a significant effect  on  yield,  seed  size,  maturity,  or  plant  height.  Among  all  environments,  seed  size  was  highly  heritable,  and  yield  heritability  was  relatively  low.  Yield  and  maturity  were  negatively  correlated,  yield  was  positively  correlated with height, and maturity was positively correlated with seed size. These results can be used to optimize specialty soybean seed production in the southern United States.

Keywords :
Food-grade soybean; Irrigation; Row spacing; Planting date; Seed size

Date Deposited : 05 Apr 2016 15:46

Last Modified : 05 Apr 2016 15:46

Official URL:

Volume 2, Number 4, November 2014 , ISSN ISSN: 2329-8863

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