Effect of wheat planting density and weed management on nutrient accumulation and uptake of wheat and weeds under agro-climatic condition of Quetta-Pakistan
Year: 2019
Type: article
Abstract: Weed infestation ranked first as main constraint in agriculture production system because both weeds and crop striving for space, light, water and nutrients.For this purpose, a field trial was designed in CRBD across factorial management during 2017-18.Four different seed rates (100, 125, 150 and 175 kg ha -1 ) tested against weed management practices (no weeding, herbicide application, hand hoeing and allelopathic weed control) and replicated thrice.The results revealed that seed rate of 125 kg ha -1 increased grain yield (4.24 t ha -1 ).The wheat physiological traits were also improved on this seed rate with CGR (16.80 g m -2 day -1 ) and NAR (4.78 16.80 g m -2 day -1 ).This medium seed rate also increased leaf N, P and K concentration by 34.72, 56.76 and 31.79%over 100 kg ha -1 , 11.56, 20.83 and 6.48% over 150 kg ha -1 .However, higher seed rate reduced its uptake by 48.84, 57.92 and 11.28% over 125 kg ha -1 and 29.84, 60.00 and 10.68% over 150 kg ha -1 .The weed whole plants N, P and K concentration and uptake reduced on higher seed rates.While, herbicide application effectively controlled weeds by 90.56% followed by hand hoeing (84.55%).According to linear regression analysis, a positive and significant correlation was noted between grain yield and CGR (r = 0.90) and grain yield and NAR (r = 0.93).Consequently, it can be established from this study that weeds controlled by herbicide application and crop sown with seed rate of 125 kg ha -1 minimized weed crop competition and increased crop yield.
Source: Pure and Applied Biology
Author: Mohammad Sharif
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $200
OpenAlex ID: W2953579893