Nutrient Management :: Blackgram
BLACKGRAM ( Vigna mungo L.)
Seed Treatment with Biofertilizer
Treat the seeds with 3 packets (600 g/ha) of Rhizobial culture CRU-7 + 3 packets (600 g/ha) of PGPR and 3 packets (600 g/ha) of Phosphobacteria developed at TNAU using rice kanji as binder. If the seed treatment is not carried out apply 10packets of Rhizobium (2000 g/ha) + 10 packets of PGPR (2000 g/ha) and 10 packets (2000 g) of Phosphobacteria with 25 kg of FYM and 25 kg of soil before sowing.
*Note : Applied in the form of gypsum if Single Super Phospate is not applied as a source of phosphorus
Foliar spray of 1% urea for yield improvement in black gram
For yield improvement through increasing the physiological, biochemical attributes, foliar spray of urea 1% on 30 and 45 days after sowing is recommended. For rice fallow pulses in Delta area, the present recommendation of foliar spray of 2% DAP may be continued.
Foliar spraying to mitigate moisture stress
Foliar spraying of 2% KCl + 100 ppm Boron during dry spell as mid season management practice in black gram during Rabi season is recommended to increase the yield over KCl spray alone .
Economizing the use of micronutrients through seed treatment for blackgram
Seed coating with biofertilizers and micronutrients viz., Zn, Mo & Co @ 4, 1, 0.5 g/kg of seed is recommended.
Nitrogen substitution by organic sources for pulses
50 per cent nitrogen can be substituted through organic source (850 kg of vermicompost per hectare). Lime application is recommended for pulses with soil pH less than 6.0.
Multi bloom technology
A special technology being practiced in Pattukottai block of Tanjore district for blackgram and greengram. The soil is alluvial and rich in organic matter and nutrients. The crop is sown during early summer (Jan.-Feb.) as normal crop and fertilizer is applied as per the recommendation for irrigated crop. In addition to that, top dressing of Nitrogen is done with an extra dose of 25 to 30 kg through urea. Since pulses are indeterminate growth habit and continue to produce new fleshes the top dressing will be done on 40-45 days after sowing. The crop complete its first flesh of matured pods during 60-65th day, further their second new flesh within 20-25 days. Therefore two fleshes of pods can be harvested at a time within the duration of 100 days.
Updated on : 03.06.2013