Short-Term Complete Submergence of Rice at the Tillering Stage Increases Yield

Abstract

Flooding is a major threat to agricultural production. Most studies have focused on the lower water storage limit in rice fields, whereas few studies have examined the upper water storage limit. This study aimed to explore the effect of waterlogging at the rice tillering stage on rice growth and yield. The early-ripening late japonica variety Yangjing 4227 was selected for this study. The treatments included different submergence depths (submergence depth/plant height: 1/2 (waist submergence), 2/3 (neck submergence), and 1/1 (complete submergence)) and durations (1, 3, and 5 d). The control group was treated with the conventional alternation of drying and wetting. The effects of waterlogging at the tillering stage on root characteristics, dry matter production, nitrogen and phosphorus accumulation, yield, yield components, and 1-aminocyclopropane-1-carboxylic acid synthase (ACS) gene expression were explored. Compared with the control group, the 1/1 group showed significant increases in yield, seed-setting rate, photosynthetically efficient leaf area, and OS-ACS3 gene expression after 1 d of submergence. The grain number per panicle, dry weight of the aboveground and belowground parts, and number of adventitious roots also increased. Correlation analysis revealed a significant positive correlation between the panicle number and nitrogen content; however, no significant correlation was found for phosphorus content. If a decrease in rice yield of less than 10% is acceptable, half, 2/3, and complete submergence of the plants can be performed at the tillering stage for 1-3 d; this treatment will increase the space available for rice field water management/control and will improve rainfall resource utilization.

ALA Pretreatment Improves Waterlogging Tolerance of Fig Plants

“…Under natural conditions, plants are frequently exposed to transient or long-term soil waterlogging, which has long been identified as a major abiotic stress [ 1 , 2 ]. Soil waterlogging significantly limits growth, development, and survival of numerous plant species, not only in natural ecosystems but also in agricultural and horticultural systems [ 3 , 4 ]. Exploring effective approaches is of urgent need to improve plant waterlogging tolerance.…”

Increasing Grain Yield of Submergence-Tolerant Rice (Oryza Sativa L.) Through Appropriate Nutrient Management

“…Similar finding was occurred in the report of Bhowmick et al (2014), in which, higher seed setting rate contributed to higher grain yield of submergence rice. In addition, filled grain percentage was affected by increase water depth and flooding duration (Zhang et al, 2015). In the present study, the treatments in which no potassium was applied (N1 and N3) adversely affected the yield and its components.…”

Modified Application of Nitrogen Fertilizer for Increasing Rice Variety Tolerance toward Submergence Stress

“…The higher the plants dry matter weight, the higher the obtained grain yield. In addition, the research result of [23] reported that the grain yield also has very real relationship to the nitrogen content.…”