Effect of different densities of Rumex spinosus on growth and yield of wheat (Triticum aestivum) and spectral characteristics of Rumex spinosus

GURMEET SINGH BUTTAR; TARUNDEEP KAUR; RAMANJIT KAUR; VAJINDER PAL KALRA

doi:10.59797/ija.v62i2.4278

Authors

GURMEET SINGH BUTTAR
TARUNDEEP KAUR
RAMANJIT KAUR
VAJINDER PAL KALRA

DOI:

https://doi.org/10.59797/ija.v62i2.4278

Keywords:

Grain yield, Growth, Remote sensing, Rumex spinosus, Wheat

Abstract

A field experiment was conducted during the winter (rabi) seasons of 201213 and 201314 at Ludhiana, Punjab, to study the spectral characteristics of Rumex spinosus L. in wheat (Triticum aestivum L.) and to identify the optimum time for distinguishing R. spinosus from wheat crop. The treatments consisted of different density lev- els of R. spinosus, viz. 5, 10, 15, 20, 25 and 30 plants/m2 and a sole population of R. spinosus and solid wheat stand. A decreasing trend in growth, yield-contributing characters and grain yield of wheat was observed with the increased population densities of R. spinosus from 5 to 30 plants/m2. The highest grain yield (5.4 t/ha) was re- corded in sole wheat crop and a weed density 30 plants/m2 recorded the lowest grain yield (2.9 t/ha). The highest values of radiance ratio and normalized difference vegetation index (NDVI) were recorded in pure wheat crop and the least in sole R. spinosus. Solid stand of wheat crop can be distinguished from sole R. spinosus 30 days after sowing (DAS) and remain distinguished up to 120 DAS and but different density levels of R. spinosus can be dis- criminated amongst themselves from 60 DAS onwards.

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