Growth, yield and water use of drip irrigated cassava planted in the late rainy season of North Eastern Thailand

Abstract

Field experiment was carried out at Agronomy Experimental Farm, Faculty of Agriculture, Khon Kaen University in 2015-2016 to investigate the response of cassava to supplementary irrigation during the dry season month. The experiment was laid out in split plot design with four replications. The main plots comprised two cassava varieties (Huaybong 80 and Rayong 11). The sub l included four levels of drip irrigation [I-20, EV-40 mm (crop received 20 mm of water when daily cumulative pan evapolation value reached 40 mm during the dry season months)]; [I-20, EV-60 mm] ; [I-10, EV-40 mm] ; [I-10, EV-60 mm] and [I-10] (cassava under rainfed condition without additional irrigation)]. Results indicated that irrigation at (I-20, EV-40 mm) produced maximum the fresh (52 t ha-1) and dry (22 t ha-1) storage root yield. Huaybong 80 variety a gave significantly higher the storage root yield than that of Rayong 11 variety. The highest starch content also was obtained in the (I-20, EV-40 mm) treatment. There was no significant difference in the starch content between the two cassava varieties. Water were applied in treatment [I-20, EV-40 mm], [I-20, EV-60 mm], [I-10, EV-40 mm] and [I-10, EV-60 mm] was an average 299 mm, 194 mm, 150 mm and 97 mm, respectively during the growing season. Water use efficiency was the highest (35.3 kg ha-1 mm-1) in the [I-20, EV-60 mm] treatment.

Physiological and productive aspects of cassava under different irrigation levels

“…8a and 8b). Polthanee and Srisutham (2018), studying production components in the cassava, observed greater root production under conditions of full irrigation (52 Mg•ha -1 ), with a yield of 22 Mg•ha -1 under rainfed conditions. These results were, in percentage, equivalent to those of the present research and confirm the productive potential of irrigated cassava.…”

Water Requirement of Major Tuber Crops: A Review

“…During first 3-4 months of growth, cassava requires enough moisture and it will not withstand waterlogged conditions [18]. Supplementary irrigations during dry months in cassava results more yield and drip irrigation system with 20 mm of water when the daily cumulative pan evaporation value reached 40 mm recorded two fold increase in the root yield [19]. For sprouting and establishment of setts, cassava needs sufficient moisture in soil and three fold yield of cassava was reported when drip irrigation at 100% of pan evaporation along with application of 50%N and K fertilizers during the first 40 days, 30% during 40-80 days and the rest 20% during 80-120 days after planting,supplied through drip irrigation system [20].…”

Effect of Soil Moisture and Determination of Critical Soil Moisture Contents of Cassava

“…flood irrigation, furrow irrigation, sprinkler and drip irrigation. Suitable irrigation system for dry area or water limited area is drip irrigation because of its benefit such as water saving (Kahlon, 2017), uniform application, easy management, low labor cost, decreased weed growth, increased crop yield and improved quality of crop product (Polthanee and Srisutham, 2018). Still, most cassava farmers in Thailand cannot manage drip irrigation effectively to increase their cassava productivity due to several reasons.…”