Leaf Reddening in Bt Hybrid Cotton

Raju, A. R.

doi:10.19080/artoaj.2017.03.555618

Cited by 2 publications

(10 citation statements)

References 5 publications

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“…twice FS during 2019 except T9 during 2020, the magnitude was 50% less in 2020 (Table 5) due to torrential rains (Table 2) upset the reproductive physiology of cotton, shedded all the fruiting bodies, unable to maintain index leaf NPK, besides heavy pink bollworm attack during the year. These results were in agreement with those observed in Calcareous soils researches made by Raju, 2017, 2018, 2023 and Raju and Deshmukh [6] in normal years except too wet and dry years Bt hybrid cotton results could not be realized. All these treatments were applied with two split applications of Suphala a 6.5% Sulphur containing, granular, 100% RDF @22.5 kg ha -1 N: P2O5: K2O twice on 15, 30 DAS (RCF 15:15:15 Nitro phosphate) and twice as Neem coated Urea @ 22.5 kg N ha -1 at 45 and 60 DAS i.e.…”

Section: Yield and Yield Attributessupporting

confidence: 92%

“…This is a big challenge for cotton agronomist since 2020-2023, to apply and deliver NP fertilizer in index leaf during excess rains or delayed monsoon, which is changing the growth and reproductive physiology of cotton. The results in highly Calcareous soils for foliar correction of nutrients deficiencies by spraying twice at squaring and flowering with nano ZnO 0.004% or ZnSO4 0.5% and Boron 0.3% alongwith WSF NPK to correct nutrient deficiencies were in agreement with those observed by Raju et al, 2018Raju et al, , 2023.…”

Section: Index Leaf Nutrient Contentsupporting

confidence: 90%

“…Calcareous soils were formed in semi arid to humid tropics under different litho and pedogenic process covering 70% of the total geographical area of India [1][2][3]). Calcareous soils have high free calcium, permeable, sloppy and erodible with embedded limestone hard pan can restrict choice of crops, root growth,duration and often demands frequent light irrigations [4], 2012, [5,6,3]. Calcareous soils were low in organic carbon, N, Mg, S, Fe, Cu, Mn and Zn and B but medium in available P, rich in K (Table 4) expressing visible symptoms after the onset of reproductive stage under soil moisture deficit interacting with free lime, which interferes with the uptake and availability of nutrients [3], Raju, 2023).…”

Section: Introduction 11 Soil Fertility and Fertilizer Managementmentioning

confidence: 99%

“…Benonite sulphur and seed treatment with P, S, Zn solubilizers and K mobilsers are also useful to make nutrients available to cotton [6], Raju et al, 2018. Crop-stimulants for better uptake, foliar correction of deficit nutrients in regular, chelated and nano forms are also being tested [6] and Raju, 2023 in station trials at ICAR, Central Institute for Cotton Research, Nagpur and onfarm trials in calcareous Vertisols with Bt hybrid cotton + pigeon pea strip cropping system in Kalmeshwar, north Nagpur.…”

Section: Introduction 11 Soil Fertility and Fertilizer Managementmentioning

confidence: 99%

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Validation Cropping Systems and Input Management in Calcareous Vertisols

Raju,

Manikandan,

Narala

et al. 2023

IJPSS

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Inputs were tested and validated to supply optimum P and Zn content in index leaf of Bt hybrid cotton during squaring to flowering stage, such as seed treatment with NPK consortia to encourage soil biological activities in low organic carbon highly Calcareous Vertisols alongwith 75% RDF. Bentonite sulphur @20 kg ha-1 yr-1 soil application (SA) + RDF; Sagarika seed treatment @ 0.2% alongwith twice foliar sprays @ 0.002% at squaring and flowering + RDF; Nano ZnO 4% Seed treatment twice foliar sprays@0.004% + RDF produced significant agronomic response during 2019, exception was during 2020, the magnitude was 50% less due twice torrential (>60-100mm) and five times medium (25-50mm) rains during July and August months upset the reproductive physiology of cotton, shedded all the fruiting bodies, unable to maintain index leaf NPK, besides heavy pink bollworm attack. All these treatments were applied with 100% RDF @90:45:45 N:P2O5:K2O granular, two splits of basal spot application having 6.5% Sulphur containing, N: P2O5: K2O @ 22.5 kg ha-1 twice on 15, 30 DAS and twice as Urea at 45 and 60 DAS, Bentonite Sulphur @ 20 kg ha-1 +RDF or seed treatment and foliar applications of bio-stimulants Sagarika @ 0.02% and twice foliar applications of the same @ 0.002% and Nano ZnO @ 0.004% twice produced 67-86 ppm Zn in index leaf of the Bt hybrid cotton, similar to that of chelated Zn 0.5%. These inputs produced 161-287 kg lint ha-1 i. e. more than double 38 to 50% due to better nutrient uptake, biomass production, boll number with more than ₹. 15 to 30, 000/- ha-1 profitability and 1.5 to 2.2 C:B ratio, FUE 1.6 to 1.2 and lowest cost of production in both the years. Large scale OFTs in Kalmeshwar Tq, Nagpur district (M.S.) India in highly Calcareous soils, on suitable field and horticulture crops, irrigations and inputs management confirmed the beneficial effect of RDF 150% @120:60:60 N:P2O5:K2O three splits fertilizers mixture of SSP + Urea + 20:20:0:13 soil application and also Bentonite sulphur or with and without two winter irrigations in late September besides seed treatment with PGPRs or Sagarika 0.002% before sowing and twice foliar applications with the same or alongwith chelated micronutrients 0.5% + WSF 17:44:0 and 0:0:50 2.0% + Boron 0.3% alternately with ZnSO4 0.5% or nano ZnO 0.004% alongwith Urea 2% and Boron 0.3% or were help full in doubling the seed cotton yields besides reducing the pre mature leaf reddening by maintaining optimum index leaf nutrient content.

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Section: Yield and Yield Attributessupporting

confidence: 92%

Section: Index Leaf Nutrient Contentsupporting

confidence: 90%

Section: Introduction 11 Soil Fertility and Fertilizer Managementmentioning

confidence: 99%

Section: Introduction 11 Soil Fertility and Fertilizer Managementmentioning

confidence: 99%

See 2 more Smart Citations

Validation Cropping Systems and Input Management in Calcareous Vertisols

Raju,

Manikandan,

Narala

et al. 2023

IJPSS

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“…The soil fertility status was found to be very low in organic carbon, N, Mg, S, Zn, B and medium in available P2O5 and K2O. Free calcium carbonate content was within the tolerable limits for Bt hybrid cotton (Table 2) as observed, tested and confirmed by Raju and Deshmukh [22,23]. Onset of monsoon was delayed in 2017, planting of Bt hybrid cotton was done only after receiving of 83 mm rain on 27.6.2017 and 98 mm rain on 12.6.2018.…”

Section: Resultssupporting

confidence: 72%

Soil Application of Sea Weed Extract Granules and Foliar Application of Nano ZnO to Bt Hybrid Cotton to Vertic inceptisols

Raju

2023

IJPSS

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Bt hybrid cotton was significantly benefitted by the soil application of Sagarika sea weed extract granules at 25 kg ha-1 yr-1 along with the recommended basal fertilizers dose or foliar application of nano ZnO 4% at 0.04% at squaring and flowering stages. These treatments significantly enriched index leaf residual P and Zn content beyond 20 μg g-1 fresh weight during boll development stage and this resulted in significant improvement in lint yield by 7.5% i.e. 35 kg lint ha-1 yr-1, C:B ratio by 5.0% and net returns to the tune of ₹. 5000 ha-1 over alone 100% RDF in eroded Vertic inceptisols deficient in N, Mg, S, Zn and B. Excess rains at seedling and vegetative stage followed by drought at reproductive stages in both years, reduced the economic viability of seed treatment with bio-stimulants and foliar applications besides soil and foliar application of Zn, S, B alone or together to Bt hybrid cotton.

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Leaf Reddening in Bt Hybrid Cotton

Cited by 2 publications

References 5 publications

Validation Cropping Systems and Input Management in Calcareous Vertisols

Validation Cropping Systems and Input Management in Calcareous Vertisols

Soil Application of Sea Weed Extract Granules and Foliar Application of Nano ZnO to Bt Hybrid Cotton to Vertic inceptisols

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