Back Shou-Song Yue1, Cui-Ping Wang2, Hui-lian Xu1 and Jun-Ying Dai3
International Nature Farming Research Center, 5632 Hata, Nagano 390-1401,
Japan 1
Shandong Academy of Agricultural Sciences, Jinan, China, 250100 2 and
Shenyang Agricultural University, Shenyang, China, 110161 3
Full Paper (PDF File: 19KB)
Abstract
Photosynthesis and nitrogen metabolism are the most important physiological
and biochemical processes in soybean plants. It is important to find agronomical
practices to improve these metabolic processes in order to increase grain
yield and quality. In this study, a field experiment was conducted using
effective microorganisms (EM) to see whether EM can show the expected effects
on soybean plants, with three treatments of EM spray concentrations, 0%
(CK), 0.1%, and 0.5% at flowering (August 4) and podding (August 14) stages.
Metabolic changes of soybean leaves were measured on August 8, August 19,
August 29 and September 9 with the 16th, 18th, 18th, 21st functional leaves
separately. Photosynthetic rate and stomatal conductance in functional
leaves were increased by EM treatments. Nitrate reductase (NR) activities
were improved by EM spray treatments. As a consequence, spraying EM increased
seed protein and crude fat concentration and increased seed yield.