Effect of Split Application of Nitrogen Fertilizer on Leaf Color Chart Values in Hybrid Rice (GRH1)

Sahar Yoseftabar

doi:10.5539/ijb.v5n1p79

Abstract

A field trial to determine comparing of yield and yield components of hybrid rice (GRH1) in different application of nitrogen fertilizer, comprising of 2 treatments, nitrogen fertilizer at 100,200 and 300 kg/ha was main plot and spilt application at 3 level: T1=(1/2basal-1/2mid tillering), T2=(1/3basal-1/3mid tillering-1/3panicle initiation) and T3=(1/4basal-1/4 mid tillering-1/4panicle initiation-1/4 flowering) as sub plot. Using randomized complete block design (RCBD) with 3 replications in rice research institute of Iran-departy of mazandaran (amol) in 2006 cropping season. The results showed that leaf color chart (Lcc) values increased significantly with nitrogen fertilizer. Interesting in comparison to 100 and 200 kg/ha level application of higher N-fertilizer 300 kg/ha showed a positive respond to application of high nitrogen hybrid cultivar. Effect of different split application N-fertilizer was significantly on lcc values the each time.

Highlights

Rice is most important food crop and a major food grain for more than a third of the world’s population (Zhao et al, 2011)
The results showed that leaf color chart (Lcc) values increased significantly with nitrogen fertilizer
Interesting in comparison to 100 and 200 kg/ha level application of higher N-fertilizer 300 kg/ha showed a positive respond to application of high nitrogen hybrid cultivar

Summary

Introduction

Rice is most important food crop and a major food grain for more than a third of the world’s population (Zhao et al, 2011). The presence of n in excess promotes development of the above ground aground organs with abundant dark green (high chlorophyll) tissues of soft consistency and relatively poor root growth. This increase the risk of loding and reduces the plants resistance to brash climatic condition and foliar diseases (Mohammadi et al, 2011). The lcc determines the right time of n application to the rice crop by measuring leaf color intensity which is related to leaf N status.in addition, it helps optimize N use at reasonably high yield levels, ragaed less of N source identifying the correct threshold values of the lcc is essential as they differ according to location, season varity and rice ecosystem. The critical value might fall between two existing panels of the lcc, but guidelines can be adjusted so that color panels of the lcc, will not have to be changed (Witt et al, 2005)

Materials and Methods

Results and Discussion

Discussions