International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 1
First page : (368) Last page : (378)
Article doi: http://dx.doi.org/10.18782/2320-7051.2463
Diagnosis of Nutrient Imbalances and Yield Limiting Nutrients in Low Yielding Orchards of Litchi (Litchi chinensis Sonn.) in Lower Himalayas through DRIS Approach
Savita1*, P.C. Srivastava2, Deepa Rawat2, Krishnappa R.3 and A.K. Shukla4
1Krishi Vigyan Kendra (KVK), Indi - 585 209, UAS, Dharwad, Karnataka.
2Department of Soil Science, G.B. Pant University of Agriculture and Technology,
Pantnagar- 263145, Uttarakhand, India
3Division of Crop Production, ICAR Research Complex for NEH Region, Umiam- 793103, Meghalaya, India
4Indian Institute of Soil Science, Bhopal - 462038, Mandhya Pradesh, India
*Corresponding Author E-mail: savitaiihr@gmail.com
Received: 19.01.2017 | Revised: 30.01.2017 | Accepted: 4.02.2017
ABSTRACT
The Diagnostic Recommendation and Integrated System (DRIS) is a unique statistical tool and dual ratio concept employed to diagnose nutrient imbalance and identify most yield limiting nutrients. In present study a reliable data bank of nutrient concentration versus fruit yield was developed from survey of litchi orchards grown in lower Himalayas (Uttarakhand, India). Firstly the DRIS norms were established for various nutrient ratios which obtained from the high-yield population (HYP) and then they were used to compute DRIS indices in low yielding population (LYP). Sixty-six nutrient expressions were selected as DRIS ratio norms from HYP and were found to provide statistically significant variance ratios and lower co-efficient of variations. The important nutrient ratio expressions identified in the backdrop of greater physiological significance in fruiting terminals (FT) of litchi are: P/N (0.292), Ca/N (1.274), Mg/N (0.438), P/Mg (0.667), Ca/S (10.08), Zn/S (116.7), Fe/Cu (17.13) and Cu/B (0.252) whereas for non-fruiting terminals (NFT) that expressions are N/P (3.185), K/N (0.942), Cu/N (13.60), P/Zn (0.017), K/Mg (2.250), Ca/Mg (3.417) and Cu/Zn (0.727). The nutrient element S followed by Zn, Mo and B in FT whereas in NFT, S followed by Mo, B and Zn are most common yield-limiting nutrients in LYP of litchi.
Key words: DRIS, Litchi, Nutrient ratios, Nutrient imbalance index, Yield limiting nutreint.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Savita, Srivastava, P.C., Deepa R., Krishnappa, R. and Shukla, A.K., Diagnosis of Nutrient Imbalances and Yield Limiting Nutrients in Low Yielding Orchards of Litchi (Litchi chinensis Sonn.) in Lower Himalayas through DRIS Approach , Int. J. Pure App. Biosci.5(1): 368-378 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2463
