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Study on light interception and photosynthesis of rainfed pearl millet grown under different fertility levels
KrishiKosh
View Archive Info| Field | Value | |
| Title |
Study on light interception and photosynthesis of rainfed pearl millet grown under different fertility levels
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| Creator |
Rishu Shekhar Singh
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| Contributor |
Khichar, M.L
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| Subject |
Light interception, Photosynthesis, Pearl millet
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| Description |
The present investigation was undertaken the study on light interception and photosynthesis of rainfed pearl millet grown under different fertility levels. The field experiment was conducted at the Research area of the Dry Land Agriculture, Chaudhary Charan Singh Haryana Agricultural University Hisar. The experiment was laid out in the randomized block design (RBD) allocating 13 fertilizers levels with three replications. Quantum sensor was used to measure the photo synthetically active radiation at three levels of crop canopy at ground, middle crop canopy and above the crop surface. The crop duration increased from 64.7 days in control to 71.7 days in maximum dose of fertilizer treatment. The LAI increased slowly initially up to 20 days after sowing and then faster and reached to its maximum at 50 DAS in all treatments due to photosynthesis process. Grain yield was recorded minimum in control treatment i.e. 1256.5 kg ha-1 and maximum in T13-60kg N+30kg P2O5 +20kg K2O ha-1 i.e. 2063.1 kg ha-1. Growing degree days increased from emergence to maturity in all the treatments. Heat use efficiency showed an increasing trend with advancement of growth and attained maxima at 60 days after sowing. Dry matter production in agricultural crops is closely related to the amount of photosynthetically active radiation (PAR) intercepted and utilized by the crop canopy during the period of its active growth. Photosynthesis increased from 30 to 45 days after sowing and declined thereafter till crop maturity. Among the various agrometeorological parameters, heat use efficiency was best correlated with dry matter (0.98). The radiation use efficiency explained the maximum variability in leaf area index i.e. up to 86 percent. The variability up to 79 per cent in dry matter accumulation was explained by heat use efficiency alone. |
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| Date |
2016-09-03T14:18:43Z
2016-09-03T14:18:43Z 2013 |
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| Type |
Thesis
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| Identifier |
http://krishikosh.egranth.ac.in/handle/1/75364
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| Language |
en
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| Format |
application/pdf
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| Publisher |
CCSHAU
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