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Response of summer blackgram (Phaseolus mungo L.) to dates of sowing and weed management and their residual effect on succeeding kharif fodder sorghum (Sorghum bicolar L.) under south Gujarat conditions

KrishiKosh

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Title Response of summer blackgram (Phaseolus mungo L.) to dates of sowing and weed management and their residual effect on succeeding kharif fodder sorghum (Sorghum bicolar L.) under south Gujarat conditions
 
Creator Phajage, S.K.
 
Contributor Raj, V.C.
 
Subject weeds, fruits, sowing, control methods, sowing date, harvesting, land resources, physical control, planting, crops
 
Description Field experiments were conducted during summer and kharif seasons of the year 2011-12 and 2012-13 at the College Farm, Navsari Agricultural University, Navsari (Gujarat) to study the, “Response of summer blackgram (Phaseolus mungo L.) to dates of sowing and weed management and their residual effect on succeeding kharif fodder sorghum (Sorghum bicolar L.) under South Gujarat conditions.”
The study involved eighteen treatment combinations of three levels of dates of sowing i.e. (D1) 3rd week of February, (D2) 1st week of March and (D3) 3rd week of March and six levels of weed management (W0) Weedy check, (W1) Weed free up to harvest, (W2) Pendimethalin @ 1 kg ha-1 as pre-emergence, (W3) Pendimethalin @ 1 kg ha-1 as pre-emergence + Quizalofop-p-ethyl @ 0.05 kg ha-1 as post-emergence, (W4) Quizalofop-p-ethyl @ 0.05 kg ha-1 as post-emergence, (W5) Two hand weedings at 20 and 40 DAS were evaluated in factorial randomized block design with three replications. After harvest of blackgram, the fodder sorghum was sown in kharif on same lay-out for residual studies. The soil of the experimental field was clayey in texture, low in available nitrogen (264, 258 kg ha-1, in first and second year, respectively), medium in available phosphorus (31.36, 30.91 kg ha-1, in first and second year, respectively) and fairly rich in available potash (338.23, 322.08 kg ha-1, in first and second year, respectively) with slightly alkaline in reaction.
Various growth and yield attributing characters of blackgram were significantly affected due to different dates of sowing and weed management practices. Sowing the crop on 1st week of March (D2) recorded significantly the highest seed and stover yields of summer blackgram. These were 7.89 and 34.36 per cent higher over D1 (3rd week of February) and D3 (3rd week of March), respectively for seed yield. Likewise weed free up to harvest (W1) tended to give the highest seed and stover yields, comparable yields were obtained with two hand weedigns at 20 and 40 DAS. Similar trend was also found in growth and yield attributes of blackgram mainly due to effective control of weed population and weed biomass.
Weed population at 20, 40, 60 DAS and at harvest and dry weight of weeds at harvest were significantly the lowest when crop was sown on 3rd week of February (D1) and markedly higher under weedy check (W0). Dry weight of weeds at harvest is concerned all the treatments of weed management differed significantly from each other and remained in W5
 
Date 2016-05-02T07:34:00Z
2016-05-02T07:34:00Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65694
 
Language en
 
Format application/pdf
 
Publisher NAU