rajendra poster FInl 1

INTRODUCTION

1. To find out the effect of nitrogen level and zinc on growth, yields attributes and yield of rice.

2. To assess the nitrogen and zinc content in rice grain.

3. To study the economics of the treatments.

The first author acknowledge the facilities provided by Institute of Agricultural Science, BHU, Varanasi during the course of investigation.

Acknowledgement

PRODUCTIVITY AND PROFITABILITY OF DIRECT SEEDED RICE UNDER DIFFERENT NITROGEN AND ZINC LEVELS

Rajendra Prasad Meena1*, S. K. Prasad2 and M. K. Singh2

1M.Sc (Ag) Student, Department of Agronomy, BHU, Varanasi,

2Assistant Professor, Department of Agronomy, BHU, Varanasi

*Corresponding author: rajujhiri06@mail.com

Transplanted rice is a labour intensive, cumbersome and high water demanding. Direct seeded rice (DSR) is a new

rice production technique that avoids all problems relating to transplanted rice.

Nitrogen and zinc deficiencies are the genuine problems of Indian soil that reduce the productive potential of rice.

Nitrogen is an essential element that determine rice grain yield by promoting tillering and increasing spikelet

number per panicle.

Zn is involved in nitrogen metabolism that triggers Zn mediated NUE.

The information on performance of DSR under different nitrogen and zinc fertilization is lacking. Hence the present

study was undertaken to find the response of DSR to different N rates and zinc scheduling for higher yield and

economic returns.

Validation of NE-DSS for Hybrid Maize with different genotypes under conservation agriculture clearly showed the superiority of NE based recommendation over

existing practices in terms of yield, profitability, and soil fertility. It is a unique tool for large scale implementation of SSNM in India where over 80% of the farmers

are marginal and small farmers, as they do not have access to soil testing.

Table 1: Effect of nitrogen levels and zinc scheduling on plant height, grain yield, grain zinc content and net return of

direct seeded rice.

Fig. 3. Cost of cultivation, gross return and net return (Rs/ha)

OBJECTIVES

MATERIALS AND METHODS

RESULTS AND DISCUSSION

Fig. 1. Effect of nitrogen levels and zinc application on yield

Fig. 2. Grain Zn content (ppm)

CONCLUSION

Nitrogen levels

• N0 - Control

• N1 - 90kg Nitrogen ha-1

• N2 - 120kg Nitrogen ha-1

• N3 - 150kg Nitrogen ha-1

Zinc Scheduling’s

• Z0 - Control

• Z1 - 0.3% ZnSO4.H2O Spray at anthesis

• Z2 - 0.3% ZnSO4.H2O Spray at early milking

• Z3 - 0.3% ZnSO4 .H2O Spray at dough stage

Treatments - 4 Nitrogen levels

4 Zinc Scheduling's

Design - FRBD

Replication - Three

TreatmentsPlant height (cm) at

harvestGrain yield (kg ha-1)

Grain

Zinc

content

(mg kg-1)

Net returns

(×103 ₹/ha)

N- rates

N0 (control) 94.50 3046.67d22.18 21.173d

N90105.80 3626.52c

25.81 29.719c

N120112.42 3952.16b

27.80 35.054b

N150120.37 4340.93a

34.83 41.275a

Zinc management/ timing of zinc application

0% ZnSO4 spray (control ) 102.72 2717.95 d 21.98 13.174d

0.3% ZnSO4 spray at anthesis 119.33 4368.75 a23.03 43.005a

0.3% ZnSO4 spray at early milking106.65 4026.76 b

28.84 36.828cb

0.3% ZnSO4 spray at dough stage104.38 3852.83 c

36.75 34.214b

Significance

SE m ± 3.52 98.71 1.13 1.738

CD (P=0.05) 10.15 285.09 3.28 5.021

NxZn NS S S NS

Table 2: Interaction effect of N x Zn on grain yield, zinc content and uptake in grain

Treatments

Grain

yield (kg ha-1) Zinc content (mg kg-1)

Nitrogen levels (kgha-1)

N0 N90 N120 N150 N0 N90 N120 N150

Zn management

0% ZnSO4 spray (control )

2270.83 2753.20 2866.66 2981.09 18.79 21.83 22.58 24.75

0.3% ZnSO4 spray at

anthesis 3525.63 4006.41 4360.90 5582.05 21.51 19.69 20.71 30.23

0.3% ZnSO4 spray at early

milking 3305.28 3879.80 4320.51 4601.44 22.20 29.45 30.96 32.77

0.3% ZnSO4 spray at dough

stage 3084.93 3866.66 4260.59 4199.13 26.23 32.29 36.95 51.57

C.D. (P=0.05) of NxZn 570.18 0.30

0

2000

4000

6000

8000

10000

12000

N0 N1 N2 N3

Yie

ld

Nitrogen levels

0

2000

4000

6000

8000

10000

12000

Z0 Z1 Z2 Z3

Yie

ld

Zinc application

Grain yield (kg ha-1)

Straw yield (kg ha-1)

Biological yield (kg

ha-1)

0

10

20

30

40

50

60

N1 N2 N3 N4

Zin

c co

nte

nt

(PP

M)

Nitrogen levels

Z1

Z2

Z3

Z4

0

10000

20000

30000

40000

50000

60000

70000

80000

90000

N0 N1 N2 N3

Eco

nom

ics

of

cult

ivati

on

Nitrogen levels

Cost of cultivation

(`

Gross returns (`

ha-1)

Net returns (`

1. Half of N2 as basal dose

2. Half at 40 DAS

Application of 150 kg N ha-1 and 0.3% ZnSO4 spray at dough stage of crop recorded maximum

zinc content.

Application of 150 kg N ha-1 and 0.3% ZnSO4 spray at anthesis was fetched significantly higher

grain yield, net returns and B:C ratio in direct seeded rice.

A positive correlation was found between N and Zn in terms of grain yield and grain Zn

content.