Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Root System Response and Yield of Irrigated rice in Relation to Irrigation, Potassium and Nitrogen under Subtropical Condition

Version 1 : Received: 20 April 2023 / Approved: 20 April 2023 / Online: 20 April 2023 (09:40:25 CEST)

A peer-reviewed article of this Preprint also exists.

Kaysar, M.S.; Sarker, U.K.; Kheya, S.A.; Hasan, A.K.; Hossain, M.A.; Somaddar, U.; Saha, G.; Chaki, A.K.; Hashem, A.; Abd_Allah, E.F.; Uddin, M.R. Root System Response and Yield of Irrigated Rice in Relation to Irrigation, Potassium and Nitrogen under Subtropical Conditions. Agronomy 2023, 13, 1626. Kaysar, M.S.; Sarker, U.K.; Kheya, S.A.; Hasan, A.K.; Hossain, M.A.; Somaddar, U.; Saha, G.; Chaki, A.K.; Hashem, A.; Abd_Allah, E.F.; Uddin, M.R. Root System Response and Yield of Irrigated Rice in Relation to Irrigation, Potassium and Nitrogen under Subtropical Conditions. Agronomy 2023, 13, 1626.

Abstract

Irrigation and fertilizer are two essential factors affecting rice root traits and yield. In this respect, a pot experiment was performed at the boro (dry season irrigated) season of 2021-22 in the Department of Agronomy of Bangladesh Agricultural University, Mymensingh, Bangladesh. The variety Binadhan-10 was planted at two irrigation conditions i.e. saturation (S) and continuous flooding (CF); two potassium (K) dose e.g. 65 kg ha-1 (K65) and 98 kg ha-1 (K98) and two nitrogen (N) dose i.e. 140 kg ha-1 (N140) and 210 kg ha-1 (N210). The experiment was laid in split plot design and replicated thrice. The findings confirmed the effectiveness of irrigation, K and N on root number (RN), root length (RL), root volume (RV), leaf area index (LAI), total dry matter (TDM), yield attributes and yield. Considering interaction among irrigation, K and N, S condition with K65 and N140 showed best performance. At 80 DAT, the highest RN (373.00), RL (1700.00 cm), RV (8.90 cm3 hill-1), LAI (4.94) and TDM (25.83 g plant-1) was obtained from this combination. Grain yield (GY) and root traits except root porosity, showed a significant positive association. Grain yield (GY) was highest (27.12 g pot-1) in S condition with K65 and N140.

Keywords

root volume; total dry matter; correlation matrix; cross sectional view; harvest index

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

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