섬유

evaluating decision criteria for irrigation scheduling of cotton

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 277
irrigation scheduling methods using three threshold canopy temperatures (28 c, 30 c, and 32 c) were compared with soil water moisture weekly (swr) or at approximately two-week intervals (aus) and a treatment that received only preplant irrigation (dry). the largest quantity of water applied (rainfall plus irrigation) was to swr (138 cm). the quantities for aus (75 cm) and 28c (70 cm) treatments were similar, followed by 30c (46 cm) and 28 c (70 cm) treatments were similar, followed by 30c (46 cm), 32c (36 cm), and dry (18 cm). water used by these treatments was 133, 75, 78, 52, 46, and 29 cm, respectively. volumetric soil profile moisture content of 0.28 in the swr and aus treatments at the end of the season showed little depletion while the 28 c, 30 c, and 32c treatments were lower at 0.24. average canopy temperatures, link yield, boll maturity rate, fiber length and other measurements are reported. ae 8 refs
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