Changes in Lot Scale Water Use and Management by Adopting Direct Seeding Culture in a Well-drained and Non-tilled Paddy Field
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Accession number;03A0395291
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| Title;Changes in Lot Scale Water Use and Management by Adopting Direct Seeding Culture in a Well-drained and Non-tilled Paddy Field |
| Author;
LEE S
(Gifu Univ., JPN)
SENGE MASATERU
(Gifu Univ., Faculty of Agriculture, JPN)
ITO KENGO
(Gifu Univ., Faculty of Agriculture, JPN)
HAYASHI HIROYASU
(Gifu Univ., Faculty of Agriculture, JPN)
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Journal Title;Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
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Journal Code:S0345A
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ISSN:0387-2335
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VOL.;NO.224;PAGE.185-192(2003)
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| Figure&Table&Reference;FIG.8, TBL.4, REF.6 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The water balance of transplanting culture (TP) and direct seeding culture in a well-drained paddy field (DS) were measured for 3 years in order to clarify the changes of lot scale water use by adopting DS. It was observed that the water requirement in TP at the initial stage of irrigation was influenced by time lag of puddling and transplanting. On the other hand, water requirement of DS was influenced by infiltration rate. Mean value of water requirement during cultivation periods in DS (41.4mm/d) was 2.0 times that of TP (20.2mm/d). From the analysis of the water balance, it was clear that increase of the water requirement in DS was caused by increase of evapo-transpiration and infiltration rates. Furthermore, we deduced that the increase of water requirement in DS was caused by weakness of plowsole without puddling. In addition, the increase of infiltration rate in DS had effects on ponding depth and lot-management water requirement during cultivation periods. (author abst.) |
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