Research acheivements

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Article Index
Research acheivements
Agronomy
Soil Science
Plant Physiology
Entomology
Plant Pathology
Crop Improvement
crop production
crop protection
All Pages

Crop Production

Agronomy 

  • The total labour input saving was 21 - 25 % in Mechanised System of Rice Intensification (MSRI) as compared to SRI. MSRI and SRI performed similarly with respect to B:C ratio.
  • Leaf  Color  Chart  (LCC)  based  nitrogen management practice resulted significantly higher   gross   returns,   net   returns   and B:C ratio as compared to other nitrogen management   practices   except   Soil   Test Crop Response (STCR) based nitrogen management practice. 
  • The  major  nutrient  uptake  in  grain  and straw increased with increase in fertilizer dosage along with addition of biofertilizers. The highest uptake of major nutrients was at 125% RDF + Biofertilizers and lowest with 75% RDF. 
  • In   bio-fortification  screening   trial,   lines- BLVR 86, 70, 349, RPHP 105, 106 were promising with respect to growth and yield parameters. 

 

 Soil Science 

  • Grain    yield    performance    and    several NUE indices indicated that the genotypes Tulasi,  Rasi  and  Vikas  from  early;  KRH2 and Varadhan from medium and Dhanrasi from long duration group were the most. GSR lines viz., HUANGHUAZHAN, TME 80518, and IRRI 105 exhibited efficiency at sub-optimal N level (N0) and responded to applied N (N 100).
  • N O       emissions       were       significantly reduced  from  the  rice  field  by  use  of  all the three nitrification inhibitors namely, Dicyandiamide (DCD), Neem Coated Urea (NCU) and Karanjinas compared with urea. Total N2O–N emissions were the highest with urea (0.73 kg/ha) followed by Karanjin + Urea (0.62 kg/ha). The highest inhibition of total N2O emission (53%) was recorded from plots treated with Urea + DCD.
  • The    inoculation    with    Gluconacetobacter diazotropicus was found to improve the seedling leaf water content (39.4%) and reduced         electrolyte   loss    (58.1%)   under water deficit stress in comparison with uninoculated   seedlings    which    showed 27.4% and 61.6%, respectively. Inoculation was also found to improve the recovery of plants after resuming irrigation. 

 

 Plant Physiology 

  • Correlation and regression studies indicated that  Pn    is    positively   associated   with carboxylation efficiency, gs  and  ETR.  The positive association with ETR and PN indicate that this parameter can be used to screen large number of genotypes as measuring ETR is faster. The PN was significantly associated with TDM and grain yield.
  • Multiple regression analysis based on lmg (Lindeman, Merenda and Gold) metric indicated that  the carboxylation  efficiency (PN/Ci)contributed  >30%  to  the  R2 value of 0.86 followed by transpiration (14%) and ETR(11%).
  • Based on the ideotype breeding experiments in rice, it was found that KRH-2, PHB-71 and 13-7 (hybrids cluster), Jaya, Swarna and Sampada (indica cluster) and TJP-27, TJP- 197 and TJP-139 (tropical japonica cluster) can serve as potential donors to get increased grain yields with good grain quality and ideal morpho-physiological traits associated with grain yield.