Study on nitrogen application under different methods of planting of sugarcane
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Date
2018
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CCSHAU
Abstract
A field experiment entitled “Study on nitrogen application under different methods of planting of sugarcane” was conducted at Regional Research Station, Karnal of CCS Haryana Agricultural University during spring 2017. Soils of the experimental field were clay loam and near neutral with low organic carbon, low in available N and medium in available P and K. The experiment was conducted in split plot design with three replications and 24 treatments combinations. The treatments comprises of four methods of planting viz. Conventional planting at 75 cm (M1), Half ridge open furrow irrigation planting at 75 cm (M2), Wide bed and furrow paired row planting (35: 105 cm) (M3) and Wider planting (M4) at 120 cm and six different nitrogen levels viz. control (N1), 75 (N2), 100 (N3), 125 (N4), 150 (N5), 175 kg N ha-1 (N6) to work out effect of nitrogen application on yield and yield attributes as well as nitrogen use efficiency including their economics under different methods of planting. The results of finding reveals that planting the sugarcane with wide bed and furrow paired row planting significantly increased number of millable cane, cane yield and sugar yield over control. Highest cane yield (93.6 t/ha) followed by wider planting (86.7 t/ha) and half ridge open furrow irrigation planting (86.1 t/ha) over conventional methods (76.0 t/ha) with higher increment of 23.2 % in M3, 14.1 % in M4 and 13.3 % in M2 than M1 method, respectively was obtained. The significantly higher uptake of N, P and K was observed in wide bed and furrow paired row planting than conventional planting. The higher agronomic nitrogen use efficiency (NUE), per cent nitrogen recovery and physiological nitrogen use efficiency were also recorded in wide bed and furrow paired row planting method. Application of 175 kg N/ha being statistically at par with 150 kg N/ha (rec.) which significantly increased cane length, single cane weight, no. of tillers and number of millable cane over control. However, the maximum sugarcane yield (101.8 t/ha) was recorded at 150 kg N/ha application. The maximum agronomic NUE and per cent recovery were recorded at 150 kg N/ha. However, physiological efficiency showed a negative trend with increasing nitrogen application. The cane quality parameters viz. brix per cent, pol per cent, purity per cent and CCS per cent were not significantly affected by different planting methods and levels of nitrogen. The net return in wide bed and furrow paired row planting, wider planting, half ridge open furrow irrigation planting and conventional planting was Rs. 184039, Rs.164056, Rs.159692 ha-1 and Rs.128035 ha-1, respectively. Simultaneously, B:C was higher in wide bed and furrow paired row planting (2.53), wider planting (2.40) and half ridge open furrow irrigation planting (2.33) than 2.07 in conventional planting.
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