Impact of Nanoscale Zinc Oxide Particle on the Growth, Yield and Soil Properties under Agency Area of Andhra Pradesh
Authors: Ramana P. Venkata , Prasad T. N. K. V. , Naik Sandeep , Naidu G. Jogi 
Published: November 2022

Field experiment was carried out on silt clay loam soils at Regional Agricultural Research station, Chintapalle, Visakhapatnam, Andhra Pradesh during 2018-2020 to study the yield of response of rainfed groundnut with different levels of Nano particulate zinc oxide application along with NPK Fertilizers. The experiment consisting of eight treatments, three replications with RDF design. Results of nano  particulate zinc oxide on pod yield showed that (24.36 Q/ha) in the RDF+ nano scale zinc oxide level @  200 ppm at 25 and 45 DAS was increased over to that of normal recommended dose of N,P,K fertilizers (100% RDF) which recorded pod yield of 17.14  Q/ha only. Application of ZnSO4 through soil along with RDF showed good results (17.24 Q/ha) than RDF + Foliar application of ZnSO4 @ 2g/lit at 25 and 45 DAS (20.66 Q/ha). Application of micronutrient (ZnO) had helped in further increase in grain yields at both levels of ZnO (150% and 200% ZnO at 25 and 45 DAS). Among different treatments, significantly higher yield (24.36 Q/ha) was recorded with application of RDF + Foliar application of ZnO @ 200 ppm at 25 and 45 DAS than the only with RDF (17.4 Q/ha). With respect to method of application of ZnSO4 through soil and foliar application ZnSo4 @ 2g/lit at 25 and 45 DAS was found to be higher both levels of RDF (Pod yield of 14.6 Q/ha at RDF + Soil application of ZnSO4 @ 50 kg ha-1 and 17.24 Q/ha at RDF+ foliar application of ZnSO4@ 2g/lit at 25 and 45 DAS). With respect to other plant characteristics, comparatively more plant height (43.53 cm) at RDF + foliar application of ZnO @ 200 ppm at 25 and 45 DAS. Regarding yield attributes significantly higher test weight (30.9 g) were recorded at RDF + 200 ppm ZnO at 25 and 45 DAS. Post –harvest soil sample analysis showed highest availability of nutrients in respect of soil, the results revealed that there was no significance difference among the treatments regarding Avail. N, Available K and pH. The lowest Phosphorus (17.20 kg ha-1) was recorded with RDF+  Foliar application of  nanoscale ZnO  200 ppm at 25 & 45 DAS and highest (24.46 kg ha-1) was recorded in T9 (RDF+  Foliar application of  nanoscale ZnO  100 ppm at 25 & 45 DAS).                 

An investigation was initiated at Department of Soil science, Regional Agricultural Research Station, Chintapalle to examine the effects of nano zinc oxide on Groundnut (Arachis hypogea L.) growth, yield and Zn content in Leaves, stem and roots. A field experiment consisted of nine treatments comprised of T1: control, T2: RDF, T3: RDF+ Soil application ZnSO4@ 50 Kg/ha, T4: RDF+ Foliar application ZnSO4 2 g/L at 25 & 45DAS, T5: RDF+ Foliar application of  nanoscale ZnO  150 ppm at 25 & 45 DAS, T6: RDF+  Foliar application of  nanoscale ZnO  200 ppm at 25 & 45 DAS, T7: RDF+  Foliar application of  nanoscale ZnO  400 ppm at 25 & 45 DAS, T8: RDF+  Foliar application of  nanoscale ZnO  50 ppm at 25 & 45 DAS, T9: RDF+  Foliar application of  nanoscale ZnO  100 ppm at 25 & 45 DAS.