Effect of irrigation and antitranspirants on evapotranspiration,water use efficiency and moisture extraction patterns of barley |
| |
| Authors: | S K Yadav D P Singh |
| |
| Institution: | (1) Department of Agronomy, Haryana Agricultural University, 125004 Hissar, Haryana, India |
| |
| Abstract: | Summary Field experiments were conducted to study the effects of irrigation and antitranspirants on evapotranspirations (ET), water use efficiency (WUE) and the soil moisture extraction patterns of a barley crop grown on a sandy loam soil during the 1977 – 78 and 1978 – 79 seasons. An increase in irrigation frequency increased ET and decreased WUE. The moisture use by barley decreased with soil depth irrespective of treatment. The unirrigated barley extracted relatively more, but absolutely less moisture than the irrigated barley from the deeper soil layers. The application of various antitranspirants had no significant effect either on seasonal ET or on the pattern of moisture extraction from the root zone soil. However, daily ET was reduced significantly after the application of stomata closing type chemicals (Phenyl mercuric acetate PMA] or Atrazine) used in conjunction with reflecting type antitranspirant (Kaolin). The moisture conservation effects of these chemicals lasted about two weeks under clear weather conditions. Such rainless periods occurred during anthesis and grain development of barley in the 1977 – 1978 crop season, explaining the significant increase in WUE following the use of PMA or Atrazine with Kaolin which only occurred in this crop season. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
