Working Paper Article Version 2 This version is not peer-reviewed

Effect of Real Time Nitrogen Management on Yield Attributes of Direct Seeded Rice by using SPAD Meter and Greenseeker

Version 1 : Received: 31 May 2021 / Approved: 2 June 2021 / Online: 2 June 2021 (07:19:08 CEST)
Version 2 : Received: 3 June 2021 / Approved: 3 June 2021 / Online: 3 June 2021 (13:35:30 CEST)

How to cite: HALLE, S.; BISWAL, S. Effect of Real Time Nitrogen Management on Yield Attributes of Direct Seeded Rice by using SPAD Meter and Greenseeker. Preprints 2021, 2021060047 HALLE, S.; BISWAL, S. Effect of Real Time Nitrogen Management on Yield Attributes of Direct Seeded Rice by using SPAD Meter and Greenseeker. Preprints 2021, 2021060047

Abstract

A field experiment was conducted during Kharif 2018, laid out in Randomized Block Design with three replications having seven treatments viz. N omission (T1), N applied as basal and AT (T2), N as basal, AT and PI (T3), N as basal and top dressing at NDVI threshold of 0.75 (T4), at NDVI threshold of 0.8 (T5), at SPAD threshold of 35.0 (T6) and SPAD threshold of 37.5 (T7) with Rice variety Sahabhagidhan.The study revealed that application of 30 kg N/ha as basal dose and top dressing of 20 kg N/ha twice at 35 and 63 DAS guided by NDVI threshold value of 0.8 (T5) was found to be superior over other treatments with respect to productivity. T5 recorded highest grain yield of 4438 kg/ha which was 17.0% higher than that top dressed at NDVI threshold of 0.75 (T4) and 7.1% higher than that top dressed at SPAD threshold value of 37.5 (T7). In case of SPAD meter, nitrogen top dressed at threshold value of 37.5 (T7) produced grain yield of 4143 kg/ha which was 15.0% higher than T6. T5 produced maximum dry matter of 8678 kg/ha with highest grain yield (4438 kg/ha), straw yield (5092 kg/ha) and harvest index 46.0%.

Subject Areas

NDVI; Nitrogen; Rice; SPAD meter; Yield

Comments (1)

Comment 1
Received: 3 June 2021
Commenter: SAI SHREE
Commenter's Conflict of Interests: Author
Comment: AUTHOR DETAILS ARE CHANGED
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