Amaranth (Amaranthus hypochondriacus L.) is a quick growing multipurpose crop. Grain amaranth produces significant edible cereals grain, but known as “pseudo-cereals” to distinguish it from other cereal producing crops. It is the richest source of mineral like iron, phosphorus and calcium. Grain amaranth protein content (16%) and amino acids like lysine (5%), cystine (2.9%), methionine (4.4%) and tryptophan (1.4%) in comparison to the cereal crops viz., barley, maize, rice and wheat. Lysine in grain amaranth is said to be herbal cure for herpes (a common and painful skin disease in HIV/AIDS victims). India is the largest exported of amaranth seeds. In the year 2015-16 India exported amaranth seeds worth USD 1,138,974. India export near to 70% of amaranth every year of the total exports made out of India. The crop is being grown under input starve condition by the resource poor farmers.
Weeds are one of the major constraints in grain amaranth production and yield losses due to weed infestation are maximum. In irrigated condition, weed infestation is generally high, the severe crop-weed competition leads to major constraints in achieving higher productivity potential.
Although grain amaranth is a tall growing plant but initial growth is slow and it is susceptible to competition from weeds. Simultaneous emergence and rapid growth of weed lead to severe crop-weed competition for light, moisture, space and nutrients. In agriculture, weeds cause more damage compared to insects, pests and diseases, but due to hidden loss caused by weeds in crop production, it has not drawn much attention by farmers. Weeds compete with crop and reduce the seed yield up to 91 per cent. (Mali and Suwalka, 1887).The effective weed management at the early growth stage of the crop is one of the most important factors contributing to high yield. Weeds are the most yield limiting factor, especially under south Gujarat condition. Hence, the present experiment is proposed to study of integrated weed management in grain amaranth under south Gujarat condition with the following objectives.
Experiment Group
Natural Resource Management
Unit Type
(02)EDUCATION UNIT
Unit
(12)NAVINCHANDRA MAFATLAL COLLEGE OF AGRICULTURE (NAVSARI)
Department
(261)Agronomy Department, NMCA, Navsari
BudgetHead
(303/12929/02)303/01/REG/00045
Objective
1. To examine the weed flora in grain amaranth crop
2. To study the effect of different treatments on growth and yield of grain amaranth
3.To evaluate the efficacy of different treatments for management of weeds in grain amaranth crop
Season
Rabi
Location Unit Type
(02)EDUCATION UNIT
Location Unit
(12)NAVINCHANDRA MAFATLAL COLLEGE OF AGRICULTURE (NAVSARI)
Location Department
(261)Agronomy Department, NMCA, Navsari
Plot No
11-a
PI Name
(NAU-EMP-2012-000270)NAYAN MATHURBHAI THESIYA
PI Email
nmthesiya@nau.in
PI Mobile
9426536161
Year of Approval
2022
Commencement Year
2022
Completion Year
2025
Design of Experiment
RBD
Crop Spacing (cm x cm)
45 cm line sowing
Gross Plot (m x m)
4.50 m x 4.00 m
Net Plot (m x m)
3.60 m x 3.00 m
Total Experiment Area (m2)
700
Plot History Last Three Year
Kharif-Sunnhemp
Initial Soil Sample Analysis Report
Not required
Initial Soil Sample Analysis Report Attachment
Attachment Not Available!
Layout Plan
Layout Plan Attachment
Treatment
T1
:
Unweeded (Control)
T2
:
Weed free(Weeding at 20, 40 and 60 days after sowing)
T3
:
Inter culturing fb hand weeding at 20 & 40 days after sowing
T4
:
Sugarcane trash mulch @ 5 t/ha at 10 DAS
T5
:
Stale seed bed (Pre-sowing irrigation before 15 days) fb paraquat @ 0.50 kg/ha before sowing
T6
:
Stale seed bed (Pre-sowing irrigation before 15 days) fb hand weeding at 40 DAS
T7
:
Pendimethalin @ 0.5 kg/ha as Pre emergence
T8
:
Pendimethalin @ 0.5 kg/ha as PE and hand weeding at 30 DAS
T9
:
Pendimethalin @ 0.75 kg/ha as Pre emergence
T10
:
Pendimethalin @ 0.75 kg/ha as PE and one hand weeding at 30 DAS