Effect of soil water potential on radish (Raphanus sativus L.) growth and water use under drip irrigation

2005 ◽  
Vol 106 (3) ◽  
pp. 275-292 ◽  
Author(s):  
Yaohu Kang ◽  
Shuqin Wan
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Water Use ◽  
Drip Irrigation ◽  
Raphanus Sativus ◽  
Soil Water Potential ◽  
Raphanus Sativus L

scholarly journals Irrigation Criteria for Drip-irrigated Onions

HortScience ◽  
2000 ◽  
Vol 35 (1) ◽  
pp. 63-66 ◽  
Author(s):  
Clinton C. Shock ◽  
Erik B.G. Feibert ◽  
Lamont D. Saunders
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Drip Irrigation ◽  
High Frequency ◽  
Soil Water Potential ◽  
Subsurface Drip Irrigation ◽  
Crop Evapotranspiration ◽  
Marketable Yield ◽  
Long Day ◽  
Subsurface Drip

Long-day onion (Allium cepa L. `Vision') was subjected to five soil water potential (SWP) treatments (–10, –20, –30, –50, and –70 kPa) using subsurface drip irrigation in 1997 and 1998. Onions were grown on 1.1-m beds with two double rows spaced 0.56 m apart and a drip tape buried 13 cm deep in the bed center. Soil water potential was maintained at the five levels by automated, high-frequency irrigations based on SWP measurements at 0.2-m depth. Onions were evaluated for yield and grade after 70 days of storage. In 1997, total and colossal (bulb diameter ≥102 mm) yield increased with increasing SWP, but marketable yield was highest at a calculated –21 kPa because of greater decomposition in storage in wetter treatments. In 1998 total, marketable, and colossal-grade onion yield increased with increasing SWP. Onion profits were highest with a calculated SWP of –17 kPa in 1997, and at the wettest level tested in 1998. Storage decomposition was not affected by SWP in 1998. Maintenance of SWP at –10 and –20 kPa required, respectively, 912 and 691 mm of water in 1997 and 935 and 589 mm of water in 1998. Onion crop evapotranspiration from emergence to the last irrigation totaled 681 mm in 1997 and 716 mm in 1998.

scholarly journals Effects of soil water potential on the growth and physiological characteristics ofPopulus tomentosapulpwood plantation under subsurface drip irrigation

2012 ◽  
Vol 32 (17) ◽  
pp. 5318-5329 ◽  
Author(s):  
席本野 XI Benye ◽  
王烨 WANG Ye ◽  
邸楠 DI Nan ◽  
贾黎明 JIA Liming ◽  
李广德 LI Guangde ◽  
...  
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Drip Irrigation ◽  
Soil Water Potential ◽  
Physiological Characteristics ◽  
Subsurface Drip Irrigation ◽  
Subsurface Drip

scholarly journals A Comparison of Onion Production Under Sprinkler, Subsurface Drip, and Furrow Irrigation

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 839A-839
Author(s):  
Erik B.G. Feibert ◽  
Clinton C. Shock ◽  
Lamont D. Saunders
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Drip Irrigation ◽  
Soil Water Potential ◽  
Sprinkler Irrigation ◽  
Furrow Irrigation ◽  
Crop Evapotranspiration ◽  
Granular Matrix ◽  
Subsurface Drip

Onion yield and grade were compared under sprinkler, subsurface drip, and furrow irrigation in 1992, 1993, and 1994. Furrow-irrigated onions were planted on two double rows on 1.12-m-wide beds at 352,000 seeds/ha. Sprinkler- and drip-irrigated onions were planted in nine single rows on a 2.24-m-wide bed at 432,100 seeds/acre. Drip plots had three drip lines buried 0.10 m deep in each 2.24-m bed. Soil water potential at 0.2-m depth was measured by tensiometers and granular matrix sensors (Watermark Model 200SS, Irrometer Co., Riverside, Calif.). Furrow irrigations were started when the soil water potential at the 0.2-m depth reached –25 kPa. Drip-irrigated onions had soil water potential at the 0.2-m depth kept wetter than –25 kPa by daily replacement of crop evapotranspiration (Etc). Sprinkler irrigations were started when the accumulated Etc reached 25 mm. Sprinkler irrigation resulted in significantly higher onion yield than furrow irrigation in 1993 and 1994. Sprinkler irrigation resulted in higher marketable onion yield than furrow irrigation in 1993. Drip irrigation resulted in significantly higher onion yield than furrow irrigation every year. Drip irrigation resulted in higher marketable onion yield than furrow irrigation in 1992 and 1994. Marketable onion yield was reduced in 1993 due to rot during storage.

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