MAIZE CROP RESIDUE MANAGEMENT ON FERTILIZER REQUIREMENT IN DIRECT SEED SOWN RICE-ZERO TILL MAIZE SEQUENCE
| dc.contributor.advisor | M. MARTIN LUTHER | |
| dc.contributor.author | BILLA SURESH KUMAR | |
| dc.date.accessioned | 2023-11-16T13:10:42Z | |
| dc.date.available | 2023-11-16T13:10:42Z | |
| dc.date.issued | 2023-11-16 | |
| dc.description.abstract | A field experiment entitled “Maize crop residue management on fertilizer requirement in direct seed sown rice – zero till maize sequence” was conducted for two consecutive years (2020-21 and 2021-22) on sandy clay loam soils of the Agricultural College Farm, Bapatla. The experimental site was uniform in topography and homogeneously fertile. The experimental soil was slightly alkaline in reaction, non-saline in electrical conductivity, low in organic carbon, and available nitrogen, medium in available phosphorus and high in available potassium. The kharif experiment was laid out in a split plot design during both the years for rice crop. The main plot treatments consisted of four maize crop residue management practices viz., M1: Exportation of maize stover, M2: In-situ burning of maize stover (farmers practice), M3: Mulching of maize stover with rotary mulcher and M4: Incorporation of maize stover with rotovator and sub plot treatments were three fertiliser levels (S1: 100% RDF, S2: 75% RDF and S3: 50% RDF) replicated thrice. During succeeding rabi season, the experiment was laid out on the same site in a split-split plot design for maize crop wherein, the three sub plot treatments imposed to kharif rice were divided into three sub-sub plots to receive three fertiliser levels viz., F1: 100% RDF, F2: 75% RDF and F3: 50% RDF to each plot. The most popular and fine grain quality rice variety i.e., BPT-5204 and popular maize hybrid Pioneer P-3396 were grown during the experimental period. Data collected on growth parameters, yield attributes, yield, nutrient uptake of rice, available NPK and economic returns were subjected to statistical analysis which indicated that all the characters studied were significantly higher with incorporation of maize stover with rotovator (M4) with the application of 100% RDF (S1). Whereas, significantly lower values were observed with exportation of maize stover (M1) with application of 50% RDF (S3) during both the years of study and pooled data. xx The physical and physico-chemical properties viz., bulk density, pH and EC of the soil were not affected significantly either due to maize crop residue management practices or fertiliser levels after harvest of rice. The higher organic carbon and soil microbial population, noticed with incorporation of maize stover with rotovator (M4) whereas, the effect of fertiliser levels on organic carbon and soil microbial population was not influenced significantly. A significant interaction between maize crop residue management practices and fertiliser levels in rice observed for drymatter accumulation at 90 DAS, number of filled grains panicle-1, grain yield, gross return, net return and B: C ratio during both the years. The treatmental combination of incorporation of maize stover with rotovator (M4) along with application of 100% RDF (S1) was noticed at par with mulching of maize stover with rotary mulcher at the same fertiliser level and was found significantly superior to other treatmental combinations. Growth parameters, yield attributes, grain yield, stover yield, nitrogen uptake available NPK and economic returns of zero till maize were influenced significantly by maize crop residue management practices and fertiliser levels applied to kharif rice and fertiliser levels given to rabi maize. Among the maize crop residue management practices, incorporation of maize stover with rotovator (M4) had recorded higher above parameters and was observed statistically superior to other treatments. With respect to fertiliser levels applied to kharif rice, application of 100% RDF (S1) registered the maxiumum values of above parameters followed by 75% RDF (S2) and 50% RDF (S3) treatments. The above parameters shown significantly increasing trend with increase in dose of fertiliser level from 50% RDF to 100% RDF imposed to succeeding maize crop. The physico-chemical properties, pH and EC of soil after harvest of rabi maize failed to show any significant influence. The higher residual organic carbon registered with incorporation of maize stover with rotovator (M4) treatment and the lowest with exportation of maize stover (M1) treatment. The highest system productivity was observed with incorporation of maize stover with rotovator (M4) treatment and it was significant over rest of the treatments. Among the fertiliser levels imposed to kharif rice crop, the maximum values of system productivity noticed with 100% RDF (S1) treatment. The higher dose of fertiliser level i.e.,100% RDF (F1) to maize, recorded significantly more values of system productivity and the lower values recorded with 50% RDF (F3) treatment during two years of study and pooled data. Interaction effect of maize crop residue management practices and fertiliser levels applied to kharif rice was significant with system productivity; incorporation of maize stover with rotovator (M4) along with application of 100% RDF (S1) registered higher system productivity which was significantly superior over other interactions. From the investigation of two consecutive years with maize crop residue management practices and fertiliser levels given to kharif rice and fertiliser levels applied to rabi maize, it can be concluded that incorporation of maize stover with rotovator along with 100% RDF was found more effective in realizing higher grain yield of rice, availability of nutrients besides giving monetary benefits. Further, application of 100% RDF to maize crop during rabi resulted in increased grain yield and profitability besides enhancing the soil health and sustainability. | |
| dc.identifier.other | D6391 | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810201278 | |
| dc.keywords | MAIZE CROP RESIDUE | |
| dc.keywords | FERTILIZER REQUIREMENTDIRECT SEED SOWN | |
| dc.keywords | DIRECT SEED SOWN | |
| dc.keywords | RICE-ZERO | |
| dc.language.iso | English | |
| dc.pages | 327 | |
| dc.publisher | Acharya N G Ranga Agricultural University | |
| dc.relation.ispartofseries | D6391; D6391 | |
| dc.sub | Agronomy | |
| dc.theme | MAIZE CROP RESIDUE MANAGEMENT ON FERTILIZER REQUIREMENT IN DIRECT SEED SOWN RICE-ZERO TILL MAIZE SEQUENCE | |
| dc.these.type | Ph.D | |
| dc.title | MAIZE CROP RESIDUE MANAGEMENT ON FERTILIZER REQUIREMENT IN DIRECT SEED SOWN RICE-ZERO TILL MAIZE SEQUENCE | |
| dc.type | Thesis |