Vol. 19 No. 3
Evaluation of irrigation scheduling and nutrient management practices on root growth, grain quality, crop and water productivity of rice-wheat cropping system
Author(s): T. GANGMEI, N. KAUR, K. K. SAHU, A. KUMAR AND R. KUMAR
Abstract: A field trial was carried out for two consecutive years from 2018 to 2020 at the Water Management Research Farm in CSKHPKV, Palampur, India to determine the effect of different irrigation schedule and nutrient management practices on root growth, grain quality, crop and water productivity of rice-wheat cropping system. The experiment was planned in a split plot design consisting of three irrigation levels in the main plots viz., recommended critical stage regimes, irrigation at 0.8 CPE (rice) and 0.6 CPE (wheat), irrigation at 1.0 CPE both for rice and wheat and four nutrient management practices viz., inorganic management, organic management, natural farming management, integrated management in subplots. All treatments were replicated thrice. The results showed that irrigating both rice and wheat crop at 1.0 CPE in sequence resulted in significant higher root growth and productivity of crops. Water use efficiency on an average was higher with deficit irrigation regime where rice was given 0.8 CPE and wheat 0.6 CPE irrigation in sequence. Significantly higher root growth, yield and water productivity was observed under integrated nutrient management (F4) in both the crops. Organic nutrient management (F2) and integrated nutrient management (F4) proved to be better in terms of quality parameters of crops. For higher average crop and water productivity of rice – wheat sequence, the crops should be irrigated at 1.0 CPE and integrated nutrient management practice (I3F4) should be followed.
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