Journal of Food, Agriculture and Environment

Effects of short-term drought and flooding on soybean nodulation and yield at key nodulation stage under pot culture

Author(s):

Shujie Miao, Hai Shi, Jian Jin, Judong Liu, Xiaobing Liu, Guanghua Wang *

Recieved Date: 2012-06-20, Accepted Date: 2012-10-03

Abstract:

The availability of water has an important role in soybean production. The researches on the effects of short-term water stress on nodule formation and development of soybean (Glycine max (L.) Merr.) at the key nodulation stage were limited. In this study, a pot experiment was carried out to check the response of nodulation and growth of two soybean cultivars (Hefeng 50 and Kenfeng 16) to drought and flooding. Both soybean cultivars were subjected to water stress at the flowering, pod bearing and grain filling stages for 10 days. The results showed that the drought decreased the biomass of shoots and roots, while flooding inhibited root growth and increased shoot biomass. The carbon contents in root and nodule were decreased by drought and flooding, as a result, this affected nodule formation and development. Drought and flooding during the flowering stages affected primarily nodule formation, as nodule number decreased in drought compared to control. Nodule development was significantly affected by water stress at pod bearing stages. Especially at pod bearing stage with drought, nodule dry weight was decreased  by 41% and 21% for Hefeng 50 and 21% for Kenfeng 16 compared to control, while 75% for Hefeng 50 and 74% for Kenfeng 16 suffered drought stress. The stage of water stress had different influence on soybean grain yield, the decrease ranging from 11% to 69% for drought, while from 15% to 44% for flooding compared to control. These results demonstrated that the adjustment of water condition and stress stage can vary nodulation in soybean, and further affect seed yield. 

Keywords:

Nodule formation, development, yield, water stress, soybean

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Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 3&4
Category: Agriculture
Pages: 819-824

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