Responses of Sugarbeet to Deficit, High-Frequency Sprinkler Irrigation. I. Sucrose Accumulation, and Top and Root Dry Matter Production
1986
Hang, An N. | Miller, D. E.
Insufficient water frequently limits crop production worldwide. The present study was conducted to determine the effect of deficit daily sprinkler irrigation on sucrose accumulation and root and top dry matter production from sugarbeet (Beta vulgaris L.) grown on loam and sandy soils (Xerollic Camborthids and Xeric Torripsamments, respectively). Applied water ranged from 15 to 100% and 26 to 115% of the estimated evapotranspiration (Et) after near full canopy on the loam and sandy soil, respectively. On the loam soil, root sucrose concentration increased rapidly with time. The rate of increase was lower with adequate soil water than when it was limited. At the final harvest, maximum dry matter production occurred at irrigation rates equivalent to 40 to 50% of estimated Et. On the sandy soil, with limited water, root sucrose concentrations increased to a maximum about 8 weeks after irrigation treatments began and then decreased. With adequate water, root sucrose concentrations increased until harvest. Sucrose concentration was significantly higher with limited than with adequate water until near harvest. Dry matter production increased with increasing water applied up to about 85% estimated Et
显示更多 [+] 显示较少 [-]