Effect of integrated nutrient management modules on soil fertility and productivity of sugarcane in Calcareous soil
| dc.contributor.advisor | Jha, C.K. | |
| dc.contributor.author | Ranjan, Abhishek | |
| dc.date.accessioned | 2020-02-10T10:52:52Z | |
| dc.date.available | 2020-02-10T10:52:52Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | A field experiment was conducted to study the Effect of Integrated Nutrient Management Modules on Soil Fertility and Productivity of Sugarcane in Calcareous Soil during 2018 -19 at Dr. Rajendra Prasad Central Agricultural University, Bihar. The treatments comprised of organic nutrient sources viz. Trichoderma inoculated sugarcane trash, green manuring with Rhizobium inoculated green gram , biocompost (BC) + neem cake (NC) and their substitution with fertilizer-N (25, 50, 75 and 100%) along with biofertilizer (Azotobacter and PSB) and control (100%NPK). The biocompost was applied at planting (PL) and neem cake at earthing up (EL) stages. Sugarcane crop (cv. CoP 2061) planted during spring season. The mean germination per cent varied significantly from 23.7-33.9 % and 36.1-47.5 % at 30 and 45 days after planting. The integrated use of organic along with inorganics produced significantly higher number of tillers over control (100% NPK).The number of millable canes varied significantly and ranged from 94.1 x 103 - 116.2 x 103 ha-1. The treatment receiving 50% N as inorganic + 50 % N through organic fertilizer; BC, PL + NC, ER (1/2 each) + Biofertilizer) recorded highest NMC. The mean cane yield varied significantly and ranged from 70.75- 89.18 t ha-1 due to different treatments. The highest cane yield (89.18 t ha-1) was recorded in treatment receiving 50 per cent N through inorganic + 50 per cent N through organic fertilizer along with biofertilizer and lowest (70.75 t ha-1) in control (100% NPK). However, treatment receiving 75% N as inorganic + 25 % N through organic fertilizer; BC, PL + NC, ER (1/2 each) + biofertilizer was significantly superior in terms of B: C ratio (2.08) and net returns ( 1,31,856.60 ha-1). Sugar yield is a function of cane yield and followed the similar pattern as cane yield. The mean sugar yield varied significantly from 8.12 – 10.12 t ha-1. The juice recovery significantly varied (57.24 - 65.53 %) due to different nutrient management modules while, their effect on brix, pol and purity coefficient was found non-significant. The uptake of N (213.2 – 307.7 kg ha-1), P (18.31 – 29.76 kg ha-1) and K (215.81 – 311.02 kg ha-1) varied significantly due to influence of different nutrient combinations. The uptake of nutrients followed the similar trend of cane yield. The soil available N (225.8 – 257.9 kg ha-1), available P (23.61 – 29.54 kg ha-1) and available K (107.9 – 135.5 kg ha-1) varied significantly due to different treatments after sugarcane harvest. The significant increase in Fe, Zn and Mn content of post-harvest soil was also recorded due to application of organic and inorganic nutrient sources over control (100% NPK). The mean soil organic carbon (0.42 - 0.56%), soil microbial biomass carbon (95.7 – 213.7 mg kg-1) , CO2 evolution (61.2 – 160.3 mg 100g-1 soil 24 hr-1) , total organic carbon (13.21 - 20.61 g kg-1) and soil organic carbon stocks (9.8 - 13.1 t C ha-1) varied significantly due to application of nutrient from organic and inorganic fertilizer. The plot treated with organic nutrient source showed reduction in bulk density of post harvest soil over control (100% NPK). The soil organic carbon fractions viz., very labile, labile , less labile and nonlabile was found highest for the treatment receiving 100 % N as organic nutrient sources along with biofertilizers over control (100% NPK). Correlation study revealed positive correlation among different fraction of oxidizable organic carbon, total organic carbon, soil microbial biomass carbon and CO2 evolution. The different fractions of soil N viz., NO3 - - N (13.2 - 16.5 mg kg-1), exchangeable NH4 +-N (56.8 – 90.6 mg kg-1), total hydrolysable-N (265.0 -339.7 mg kg-1), non-hydolysable-N (140.5 - 164.1 mg kg-1) and total-N (478.8 – 603.1 mg kg-1) varied significantly due to various treatments under study. The total-N was highly positively and significantly correlated with exchangeable NH4 +-N, hydrolysable NH4 +-N, hexoseamine-N, amino acid-N and total hydrolysable-N. The NO3 - -N did not produce significant correlation with any of the other N fractions. Based on economics treatment receiving 75% N as IF + 25 % N through organics; BC, PL + NC, ER (1/2 each) + Azotobacter and PSB @ 4 kg ha-1 was significantly superior in terms of B:C ratio (2.08) and net retuns ( 1,31,856.60 ha-1) over all the treatments. The integrated use of organics and inorganics source of nutrients can sustain soil fertility and sugarcane productivity in calcareous soil of Bihar. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810142826 | |
| dc.keywords | Soil Science, Agronomy, Sugarcane, Calcareous Soil, | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 97p. ; xvi (Bibliography) | en_US |
| dc.publisher | Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur | en_US |
| dc.sub | Soil Science | en_US |
| dc.subject | null | en_US |
| dc.theme | Effect of integrated nutrient management modules on soil fertility and productivity of sugarcane in Calcareous soil | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Effect of integrated nutrient management modules on soil fertility and productivity of sugarcane in Calcareous soil | en_US |
| dc.type | Thesis | en_US |