RT Journal Article
SR Electronic
T1 Irrigation methods affect water productivity, grain yield, and growth responses of rice at different levels of nitrogen
JF Journal of Soil and Water Conservation
FD Soil and Water Conservation Society
SP 329
OP 336
DO 10.2489/jswc.73.3.329
VO 73
IS 3
A1 O. Aziz
A1 L. Bin
A1 M. Imtiaz
A1 J. Chen
A1 Y. He
A1 L. Lin
A1 S. Ali
A1 M. Riaz
A1 S. Mehmood
A1 M. Rizwan
A1 G. Lu
YR 2018
UL http://www.jswconline.org/content/73/3/329.abstract
AB Water conservation is an integral part of precision agriculture. In rice (Oryza sativa L.) producing countries, the looming water crisis necessitates the development of water-saving technologies. A field study was conducted to evaluate the advantages of different irrigation methods on water productivity, rice grain yield, and growth responses for the two consecutive years during 2015 and 2016. Two irrigation methods, conventional irrigation (CI) and thin-shallow-moist-dry irrigation (TSMDI), and three nitrogen (N) levels (0, 90, and 180 kg N ha−1) were tested in a split plot design with three replications. The results revealed that TSMDI significantly increased water productivity compared with CI without jeopardizing grain yield, and no significant difference was observed on crop growth parameters between irrigation methods. Two years of study results showed that under both irrigation methods, grain yield ranged from 7.59 to 8.01 t ha−1, 8.61 to 9.26 t ha−1, and 9.30 to 10.01 t ha−1 at 0 kg N ha−1, 90 kg N ha−1, and 180 kg N ha−1, respectively. Thus, TSMDI required the same fertilizer management as CI and saved water up to 16% to 21% when keeping other inputs constant. In the present study, the best combination of water and N application is TSMDI and 180 kg N ha−1, over other treatments' combinations.