Contribution of Remobilized Total Dry Matter to Soybean Yield

Abstract

It is recognized that soybean remobilizes carbohydrates and protein compounds from vegetative to reproductive organs during the last half of the seed filling period. However, reports quantifying how much of final yield is constituted by these remobilized materials under field conditions are lacking. The objective of the current study was to determine the contribution of remobilized total dry matter (TDM) to final yield under field conditions. Using five field studies conducted from 1987 through 1995 near Baton Rouge, LA (30 • N latitude), % remobilized yield was determined by using crop growth rate during the final half of seed filling (CGR[R6.2-R7]) to calculate how much of the final 50% of seed weight was contributed by remobilized TDM. The % remobilized yield was then calculated as 100 x (remobilized seed TDM/yield). Results indicated that % remobilized yield varied from 15% to 30% and tended to increase as growing conditions improved and plant size increased. Percent remobilized yield also increased when source/sink ratio declined during the rapid seed filling period (R6-R7). In conclusion, a substantial portion of final yield is derived from remobilized TDM.

Relations among Sap Flow, Soil Moisture, Weather, and Soybean Plant Parameters in High Water Demand and Final Growth Stages

“…Preliminary measurements show that daily contribution of sap Q , to the plant biomass is approximately 0.5% -0.8% of sap flow rate in R5 growth stage and 0.8% -1.2% in R6 growth stage. Higher contribution rate of sap flow to plant biomass during R6 may be due to rapid seed weight gain and remobilization processes [15].…”

Growth Response and Results of Two Sorgum Varieties With Different Dosage Application of Arbuscular Mycorrhizal

“…The leaf area is larger because it is supported by the absorption of nutrients in the soil. By increasing the leaf area, it means that it will increase the absorption of light by the leaves, then the process of photosynthesis will increase and produce aimilate which will be used as a source of growth energy in forming vegetative organs in the growth phase, while in the generative phase assimilates stored in organ tissues will be transferred to the formation of reproductive organs, such as seed filling [6].…”

Growth Response and Sugar Accumulation in First Ratoon Sweet Sorghum: Effects of Biochar and Shoot Number Manipulation

“…With an increase in leaf area, it means that it'll increase the absorption of light by the leaves, at that point the photosynthesis process will increase and produce assimilate which is able be utilized as a source of growth energy in forming vegetative organs in the growth stage, whereas within the generative stage the assimilate is stored in the tissues of the vegetative organs. will be transferred for the formation of regenerative organs, such as seed filling [22]. The climatic conditions at the time of the study had an average rainfall of about 336.75 mm with an average daily temperature of 23-34℃.…”