Nitrogen management can boost rice (Oryza sativa L.) production near aluminium smelter: A field study

Abstract

Nitrogen (N) management is a key to sustain rice yield under submerged condition. Time and amount of N application boost rice production under adverse environmental situation. To test this hypothesis a field experiment was conducted at different villages in and around Hindustan Aluminium Company Ltd. (HINDALCO), Hirakud, Sambalpur, Odisha in the year 2015 and 2016. The rice ecosystems were selected on the basis of distance from the smelter plant. Different treatments were framed to test the hypothesis as T1-Farmers practice (60:30:30 kg N: P2 O5:K2O ha-1); T2- 75% recommended dose of fertilizer (RDF) of nitrogen(N) ; T3 -100% RDF of N; T4 -125% RDF of N; T5 -150% RDF of N. It was conducted in a randomized block design with four replications in the farmer's field. The test crop was rice cv.Tejaswinee. Growth parameters like plant height (cm), panicle length (cm) and number of effective tillers per hill were found to be highest in the plots where 125% RDF of N was applied. However the chlorophyll content(mg g-1 fresh)was estimated highest with 150 % RDF of N applied plots. The grain and straw yield (q ha-1) of rice were also observed highest with treatments receiving125% RDF of N.The rice ecosystems which are nearer to aluminium smelter plant were supposed to be affected with less yield as compared to far distance rice ecosystems. The grain quality parameterof rice like protein content (%) was also affected at smelter sites as compared to far distances. However with increasing the N level to 125 % RDF protein content was increased.

Management of sulphur for yield augmentation in rice (Oryza sativa) under rice fallow system

“…Increase of such plant growth characters is owing to the positive role of S in plant metabolic activity, which led to the increase photosynthesis rate of the rice plant thereby stimulating the plant height, panicle length and effective tillers/hill of the crop. Results of the current study were in conformity with the findings of Shivay et al (2013) and Panda and Dash (2021).…”

Response of Rice Varieties at Varying Nitrogen Level

“…Nitrogen is one of the irreplaceable elements for development of various plant cellular systems [9] and its deficiency limits crop production [10]. Nitrogen is essential in rice crop being a component in synthesis of amino acids, nucleic acids, enzymes and hormones [11]. It comprises 1.5-2% of plant dry matter and on average 16% of total plant protein [12].…”