섬유

nitrogen fertilizer management of cotton grown under drip irrigation in a grumusol

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 242
a field experiment was carried out for two years on a grumusol (typic chromoxerert) soil at merhavya, israel, to study the influence of different concentrations of n in soil solution on the growth and yield of drip-irrigated cotton. the soil was analyzed for moisture and no//3-n every two weeks and the concentration of no//3-n in the soil solution was calculated. when the no//3-n concentration was less than the above-mentioned levels, n-fertilizer was added in the irrigation water to match these concentrations. if the tested soils showed higher concentrations, no n fertilizer was applied. the maximum yields of seed cotton obtained were 6. 3 ton h** $minus$ **1 in the first year, and 5. 7 ton ha** $minus$ **1 in the second year concentrations below 25 ppm n in the soil solution reduced the cotton seed and lint yields. (edited author abstract) 16 refs
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