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Study of Some Physiological Traits of Wheat Under Late Sown Condition

F. Begum
PSO
Agronomy Division, Gazipur

M. Saifuzzaman
PSO
RWRC, BARI, Goydebpur, Gazipur

Abstract/ Executive Summary:

Some physiological parameters of eight wheat varieties have been studied under late sown condition. These parameters include chlorophyll content, amount of leaf nitrogen, leaf area, leaf area index, relative growth rate, net assimilation rate, crop growth rate, days to flag leaf initiation, days to heading and the duration of crop. It is observed that chlorophyll content was the maximum at time of anthesis stage. Leaf nitrogen was maximum at vegetative stage which then decreased with the advancement of time under both sowing times. Wheat sown on Nov. 15 showed shorter plant height, lower dry matter content, less number of leaves as compared to Dec.15 sowing. Grain growth duration was longer in November sowing (52-55 days). November sowing crops suffered from lower amount of sunshine at vegetative stage resulting in poor growth which ultimately affected yield. December sowing (15 Dec.) crop suffered from higher temperature at developing resulting shorter grain growth duration (36-40days) affecting yield.

Keywords: Physiological traits, Wheat, Late sown condition, High temperature

Location: Joydebpur, Gazipur

Start Date: 25-11-2008

End Date: 00-00-2009

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

To find out the relationship between nitrogen content and chlorophyll content
To observe the growth and development of wheat under higher temperature.

Methodology:

The trial was conducted at the research field of BARI, Joydebpur, Gazipur, during rabi season of 2008-09. The experiment was laid out in a RCB design with three replications. The unit plot size was 3m x 1.8m. Eight varieties of wheat, Shaurav, Gaurav, Shatabdi, Sufi, Bijoy, Prodip, BAW 1059, BAW 1064 were included in this study. Fertilizers @ 100-60-40-20-3 kg/ha N-P-K-S respectively in the form of urea, triple super phosphate, muriate of potash and gypsum were applied. Seeds if wheat varieties were sown on 15 November 2008 and 15 December 2008. Other intercultural operations like weeding, irrigation, pesticide application was done as and when necessary. Number of leaves, plant height, leaf area, dry mater accumulation was measured at different growth stages. Ten plants were collected randomly from each plot just before harvest and yield data were recorded. Leaf nitrogen and leaf chlorophyll content were measured at vegetative, anthesis and pod developing stage. Collected data were statistically analyzed and means were separated by DMRT.

Source of Information: Annual Report, Agronomy Division, 2008-2009

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget: 15,000/-

Total Budget (Tk.) : 15,000/-

Achievement/Findings:

Leaf nitrogen was maximum at vegetative stage which then decreased with the advancement of time under both sowing times. Wheat sown on Nov. 15 showed shorter plant height, lower dry matter content, less number of leaves as compared to Dec.15 sowing. Grain growth duration was longer in November sowing (52-55 days). November sowing crops suffered from lower amount of sunshine at vegetative stage resulting in poor growth which ultimately affected yield. December sowing (15 Dec.) crop suffered from higher temperature at developing resulting shorter grain growth duration (36-40 days) affecting yield.

Knowledge Management: Report/Proceedings