Section 22
Chapter 21,108

Growth and phenology of basmati rice (Oryza sativa) as influenced by (date of transplanting, plant population and nitrogen levels

Singh, T.; Singh, T.-Pal

Crop Research 34(1-3): 20-23


ISSN/ISBN: 0970-4884
Accession: 021107159

A field experiment was conducted during kharif 2003 at Ludhiana to study the effect of date of transplanting, plant population and nitrogen level on growth and phenology of basmati rice. Date of transplanting did not influence the dry matter accumulation, stem diameter and internode length. Delayed transplanting of basmati rice significantly reduced chlorophyll 'a', chlorophyll V as well as total chlorophyll content. Different plant population treatments did not affect the chlorophyll content, stem diameter, internode length and dry matter accumulation. Nitrogen application also did not influence stem diameter, chlorophyll 'b' and internode length. However, chlorophyll 'a' and total chlorophyll increased significantly with each incremental dose of nitrogen as compared to control. Maximum chlorophyll 'a' and chlorophyll 'b' were recorded at 40 kg N/ha, while total chlorophyll (9.595 mg/g of fresh tissue) was highest at 60 kg N/ha. Maximum dry matter accumulation of 88.7 q/ha was obtained with the application of nitrogen @ 60 kg N/ha. The observations on crop phenology indicated that the crop transplanted on 5 July took 26.5 days to 50% tillering, 66.4 days to 50% booting, 87.2 days to 50% heading and 118.9 days for physiological maturity, whereas the crop transplanted on 25 July took 23.3 days for tillering, 55.4 days of 50% booting, 70.7 days for 50% heading and 108.4 days for physiological maturity. Different plant population levels took almost same number of days for attaining various phenological growth stages. Application of different levels of nitrogen resulted in early tillering, booting, heading and physiological maturity as compared to control

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