Effect of Site Specific Nutrient Management Approach In Productivity Of Spring Rice In Kanchanpur, Nepal

Chudamani Pant,Binod Dahalc,Ram Hari Gaire,Pankaj Prasad Joshi

doi:10.2478/mjhr-2020-0004

Abstract

AbstractA field experiment was carried out in sub-tropical climate of Bhimdattanagar, Kanchanpur to assess the effect of site specific nutrient management approach in productivity of spring rice. The experiment was carried in single factor randomized completely block design with four replication, in four different farmer’s field, each farmers’ field as single replication. The seedlings were grown in the mat nursery bed and transplanted in the experimental plots with different nutrient management practices. Nutrient management practices were Site Specific Nutrient Management with Nutrient Expert dose (SSNMNE)(109:28:38 kg NPK/ha), Government recommendation dose (100:30:30kg NPK/ha +6 ton FYM), Farmer’s field practice (FFP)(different among farmers) with three omission plots viz. omission of Nitrogen (0:28:38 kg NPK/ha), Omission of Phosphorus (109:0:38 kg NPK/ha) and Omission of Potassium (109:28:0 kg NPK/ha). SSNM-NE dose was obtained by household survey in the respective area and using nutrient expert model. The growth parameters, yield, yield attributing traits and total cost of production were recorded. Data were analyzed using Duncan’s Multiple Range Test (DMRT) in Genstat. Result indicates that the highest grain yield (5.81 t/ha) was obtained from SSNM-NE which was statistically at par with government recommendation (5.54 t/ha). Similarly, thousand grains weight, straw yield in the experiment 23.20g, 6.90t/ha were significantly higher in SSNM-NE respectively. Straw yield, grain yield and thousand grain weight of SSNM-NE were found to be statistically at par with government recommendation. The economic analysis revealed that higher B: C ratio (1.91), net return and gross return were higher in SSNM-NE.

Highlights

Rice (Oryza sativa L.) or Dhan in Nepali is an annual, self-pollinated and semi-aquatic plant of Poaceae Family
Rice occupies a significant position among the world’s food crops. It accounts for 50% of total edible cereal production and about 20.75% to Agricultural Gross Domestic Product (AGDP) on the country and provides more than 40% of the total calories required to the Nepalese people [1,2]
The fertilizer use efficiency of nitrogen is only 20-30% in Asia; potassium and phosphorous use efficiency are only 45% and 20-30% in world respectively. 75-80% of potential yield can be obtained by proper nutrient management [8]

Summary

Introduction

Rice (Oryza sativa L.) or Dhan in Nepali is an annual, self-pollinated and semi-aquatic plant of Poaceae Family. Rice occupies a significant position among the world’s food crops It accounts for 50% of total edible cereal production and about 20.75% to Agricultural Gross Domestic Product (AGDP) on the country and provides more than 40% of the total calories required to the Nepalese people [1,2]. Nutrient management helps to reduce loss of fertilizer and increase the production and profitability in rice farming [9]. In SSNM approach, scientists quantify crop nutrient requirement based on an economically efficient yield target; measure the potential indigenous supply of N, P and K; estimate the P and K balance for sustaining soil P and K reserves without depletion; monitor plant N status during critical period of rice growth to optimized fertilizer N efficiency and apply diagnostic criteria for identifying micronutrient disorders [11]. The purpose of this study is to access the indigenous nutrient supplying capacity of the soil, the proper amount of the nutrient to be applied in the field to get proper yield and to change the attitude the farmer about the blanket application of fertilizer

Objectives

Methods

Findings

Discussion

Conclusion