Long-term effects of integrated nutrient management on productivity and soil fertility in pearlmillet (Pennisetum glaucum) mustard (Brassica juncea) cropping sequence
DOI:
https://doi.org/10.59797/ija.v57i3.4638Keywords:
Fertility status, Integrated nutrient management, Long term study, Pearlmillet-mustard crop- ping sequenceAbstract
A field experiment on integrated nutrient management (INM) was initiated during kharif season 1997 at Gwalior under pearlmillet [ Pennisetum glaucum (L.) R. Br. Emend. Stutz] mustard [ Brassica juncea (L.) Czern. & Coss.] cropping sequence. The treatment 100% NPK + Farmyard manure (FYM) (@10t/ha/year) + Azotobactor + phos- phate solubilising bactria (PSB) provided highest yield of straw (8.60 t/ha and 6.79 t/ha) and grain (4.07 t/ha and 2.34 t/ ha) with net monetary returns (30,695 /ha and 36,514 /ha) in pearlmillet and mustard respectively and recorded the highest system productivity (10.0 t/ha). This treatment also increased OC (0.52%), available N (238 kg/ha), P O (24.8 kg/ha), and K O (218 kg/ha), sustained soil pH (7.54) and EC (0.23 dS/m) over all other treat- 2 5 2 ments. Continuous application of organic manure along with optimal dose of fertilizer (100% NPK+FYM @10t/ha/ Y) was beneficial in enhancing crop productivity and soil fertility. Treatment receiving seed inoculants ( Azotobactor and PSB), and FYM in combination with chemical fertilizers showed positive influx of N, P and K over unfertilized control and other combinations of fertility. The B: C ratio was higher for chemical fertilizer along with Azotobactor and PSB in pearlmillet (4.0) due to lesser cost of cultivation compared to other treatments, where as itReferences
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