Visual Method for Non-destructive Scoring of Iron Deficiency in Aerobic Rice Cultivars

Author: B. Soumya, K.P. Vani, Kadasiddappa M.M. and Ranjitha P.

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Abstract

The aerobic rice is grown under non-puddled, non-flooded and non-saturated soil conditions as other upland crops such as wheat and maize, by cultivating high-yielding rice varieties in aerobic soils with irrigation facilities. Under aerobic soil condition iron deficiency induced chlorosis is the common encountered problem which reduces the crop yield drastically. To overcome this problem, a field experiment was conducted at Professor Jayashankar Telangana State Agricultural University, Hyderabad, in sandy clay loam to observe the iron chlorosis in aerobic rice cultivars to varying levels of iron nutrition. The experiment was laid out in a split plot design, comprising twelve treatment combinations of iron (F0 to F11) and three rice cultivars (V1, V2 and V3) which were repeated three times. Iron treatments include two sources of iron i.e., iron sulphate and iron chelate and their combinations like foliar application, soil application and combination of both soil and foliar applications. The results indicated that iron deficiency intensity i.e. iron scoring at 15, 30, 45 and 60 DAS was significantly influenced by cultivars and iron application. Similarly, SPAD values at 30, 60, 90 DAS and at harvest was significantly influenced by cultivars and iron application. Among the cultivars tested, KRH 2 was more tolerant to iron deficiency induced chlorosis and maintained its greenness at different stages of crop growth. Iron nutrition treatments also decreased the chlorosis of rice plants, between them basal application of iron chelate @ 25 kg ha-1 along with 3 foliar sprays of iron sulphate from 21 DAS @ 7 days interval was ideal for field application.

Keywords

Aerobic rice, Fe deficiency, Rice cultivars, SPAD, Chlorosis, Iron deficiency intensity

Conclusion

KRH 2 was more tolerant to iron deficiency induced chlorosis under aerobic method of rice cultivation. Iron nutrition treatments also decreased the chlorosis of rice plants, between them basal application of iron chelate @ 25 kg ha-1 along with 3 foliar sprays of iron sulphate from 21 DAS @ 7 days interval was ideal for field application.

References

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How to cite this article

B. Soumya, K.P. Vani, Kadasiddappa M.M. and Ranjitha P. (2023). Visual Method for Non-destructive Scoring of Iron Deficiency in Aerobic Rice Cultivars. Biological Forum – An International Journal, 15(10): 945-949.