Intermittent evaporation, moisture distribution, and salt redistribution through saline-sodic clay soil as affected by irrigation frequency and quantity

M. H. Dahab, M. A. Mustafa, H. A. Abdel Rahman

نتاج البحث: المساهمة في مجلةمراجعة النظراء

5 اقتباسات (Scopus)

ملخص

We investigated the effects of three intervals (5, 10, and 20 d) and four total amounts of irrigation water (120, 240, 360, and 480 mm) applied at two rates (3 or 6 mm/d)3on intermittent evaporation, soil moisture distribution, and salt redistribution through saline-sodic clay soil columns with initial zonal distribution of salts. The results indicated that after a threshold period, which was longer for the lower rate of water application, cumulative evaporation (E) increased with decrease in irrigation interval. In accordance with previous findings, E was a linear function of the square root of time, i.e., E = c √t, where c, under the experimental conditions, is largely determined by the amount of water applied per irrigation. The transmission zone of the moisture distribution profiles lengthened and the wetting front advanced deeper, and consequently salt leaching improved as time progressed and as the irrigation interval and the amount of water applied increased. The sodium adsorption ratio profiles qualitatively followed the electrical conductivity, EC1:5, redistribution patterns. The depth of the wetting front and the amount of the water stored accounted for 97.4 and 96.8% (r.001= 0.872) of the variability of the depth of the desalinized zone, respectively. The amount of the stored water accounted for 68% (r.01= 0.765) of the variability of the weighted mean EC1:5of the desalinized zone.

اللغة الأصليةEnglish
الصفحات (من إلى)168-175
عدد الصفحات8
دوريةSoil Science
مستوى الصوت146
رقم الإصدار3
المعرِّفات الرقمية للأشياء
حالة النشرPublished - سبتمبر 1988

ASJC Scopus subject areas

  • ???subjectarea.asjc.1100.1111???

بصمة

أدرس بدقة موضوعات البحث “Intermittent evaporation, moisture distribution, and salt redistribution through saline-sodic clay soil as affected by irrigation frequency and quantity'. فهما يشكلان معًا بصمة فريدة.

قم بذكر هذا