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Rice Shoot Response to Root Confinement within a Membrane

Dep. of Agronomy, Univ. of Arkansas, Fayetteville, AR 72701

^* Corresponding author.

A porous membrane has been used for root studies of upland crops but not for crops grown under submerged conditions. A field study was conducted to compare the growth of paddy rice (Oryza sativa L.) with and without root confinement within a porous membrane. Three membrane configurations were compared: (i) a narrow membrane; (ii) a wide membrane; and (iii) a modified wide membrane. Root confinement within membranes reduced all shoot growth and yield parameters compared to soil-grown plants (control). Reductions in shoot growth and yield parameters were usually least for the modified wide membrane and greatest for the narrow membrane.

Received for publication September 17, 1990.