The Impact of Adsorbent Ameliorants on some Physical Properties and Potato Yield in Sandy Soil Under Deficit Irrigation Water

Ismail, Sahar Mohamed; A. E. El-cossy, Salah

doi:10.21608/asejaiqjsae.2023.333655

The Impact of Adsorbent Ameliorants on some Physical Properties and Potato Yield in Sandy Soil Under Deficit Irrigation Water

Document Type : Original Article

Authors

¹ Soil physics and chemistry Department, Water Resources and Desert Soils Division, Desert Research Center (DRC), Cairo, Egypt.

² Soil Conservation Department, Water Resources and Desert Soils Division, Desert Research Center, Egypt.

10.21608/asejaiqjsae.2023.333655

Abstract

Sandy soils have characterized by low soil water storage and poor fertility. This study is conducted in the Suez Canal region, to improve and evaluate some soil physical properties, potato yield components, quality and economic returns as a result of addition soil adsorbent ameliorants (PPA, PAM & humic acid (HA)) and mixtures of each with the others plus control treatment under deficit irrigation water regimes (100, 80 and 50 % of crop water requirements, CWR) with three replicates. The results showed that the mixed ameliorant treatment of PAM plus humic acid obtained the highest soil moisture content at 20-40 cm of soil depth. Soil ameliorants significantly improved soil water storage and soil aggregate size distribution (P ≤ 0.01). The results also showed that the deficit irrigation water regimes led to increase in the mass proportion of large macro-aggregates (> 2.0 mm) and micro-aggregates (< 0.25 mm) in all soil depths. The mixed ameliorant treatment of PAM + humic acid produced highest fresh tuber yield and commercial tuber proportion. Water use efficiency (WUE) values were higher with the mixed than single ameliorants under different deficit irrigation water regimes. The applied of PPA or PAM alone had a higher economic return than the mixed treatments of PPA or PAM. The economic return not detected when the humic acid applied alone.

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