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20171
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Subject: Agronomy × Author: Amandeep Kaur × End date: 2020 × Start date: 2000 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Growth and yield of pigeonpea [Cajanus cajan (L.) Millsp.] as influenced by growth retardants and sowing dates
    (Punjab Agricultural University, Ludhiana, 2017) Amandeep Kaur; Harmeet Singh
    The present study entitled “Growth and yield of pigeonpea [Cajanus cajan (L.) Millsp.] as influenced by growth retardants and sowing dates” was carried out at Student’s Research Farm, Department of Agronomy, Punjab Agricultural University, Ludhiana during kharif 2016. The field experiment comprising of sixteen treatments viz., control, water spray, MH @ 200, 250 and 300 ppm and TIBA @ 25, 50 and 75 ppm and two sowing dates (May 15 and May 30) was conducted in a Randomized Complete Block Design (RCBD) with three replications on sandy loam soil which was normal in pH (7.57-7.59) and electrical conductivity (0.139-0.117 dsm-1), low in organic carbon (0.23-0.26%), and available nitrogen (112.4-129.2 kg ha-1), medium in available phosphorus (18.50-21.70 kg ha-1) and available potassium (298.2-310.6 kg ha-1). May 15 sown crop produced significantly higher dry matter, LAI, number of branches, pods and grain yield than May 30 sown crop. May 15 sown produced significantly taller plants and significantly influenced CGR, RGR and LAD. Quality parameters such as N, P, K and protein content in grain and stover remained unaffected by growth retardants and sowing dates. Nodule count and weight of nodule plant-1 were not significantly affected by growth retardants and sowing dates. No effect on phenology of crop and chlorophyll content was observed by either sowing dates and growth retardant treatments. Various growth and yield parameters viz., Crop Growth Rate, Relative Growth Rate, Leaf Area Duration, dry matter, Leaf Area Index, secondary branches plant-1 and pods plant-1 were statistically higher with application of TIBA @ 75 ppm than all other growth retardant treatments and control but was statistically at par with TIBA applied @ 50 ppm. As a result, highest seed yield of pigeonpea (14.4 q ha-1) was recorded with application of TIBA @ 75 ppm although at par with foliar application of TIBA @ 50 ppm but was 22.9 per cent higher than control. Similar increase in stover yield and harvest index was also observed. No significant effect of different growth retardant sprays was found on various quality parameters like nitrogen, phosphorous, potassium and protein content of seed and stover.