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LIGHT INTERCEPTION, RADIATION USE EFFICIENCY AND BIOMASS ACCUMULATION RESPONSE OF MAIZE TO INTEGRATED NUTRIENT MANAGEMENT UNDER DROUGHT STRESS CONDITIONS

Authors :
Muhammad Saqib Randhawa
Sanaullah Yasin
Usman Zulfiqar
Muhammad Maqsood
Rana Dildar Khan
Muhammad Umer Chattha
Muhammad Bilal Chattha
Muhammad Nawaz
Tasawer Abbas
Fahim Nawaz
Muhammad Asif Shehzad
Source :
Volume: 22, Issue: 1 134-142, Turkish Journal Of Field Crops
Publication Year :
2017
Publisher :
Turkish Journal of Field Crops, 2017.

Abstract

In order to alleviate the drought adversities on maize (Zea mays L.)biomass accumulation and radiation useefficiency (RUE), a field study was conducted under drought stress levels of D1 = well-watered, D2 = droughtstress at blister stage, D3 = drought stress at blister and dough stages; and integrated nutrition levels, N0 =control, N1 = NPK, 125-60-62 kg ha-1, N2 = NPK, 125-60-62 kg ha-1 + FYM at 10 t ha-1, N3 = NPK, 125-60-62 kgha-1 + FYM at 15 t ha-1, N4 = NPK, 250-120-125 kg ha-1, N5 = NPK, 250-120-125 kg ha-1 + FYM at 10 t ha-1, N6 =NPK, 250-120-125 kg ha-1 + FYM at 15 t ha-1. Drought stress caused a significant decline in growth traits,interception of photosynthetically active radiation (PAR), RUE and finally biomass production. The highestleaf area index, leaf area duration, crop growth rate, net assimilation rate, interception of PAR and dry matteraccumulation was recorded in plants applied with NPK (250-120-125 kg ha-1) in combination with FYM (15 tha-1), whereas only NPK application did not significantly improve light interception and dry biomassproduction. Fraction of intercepted (Fi) radiation was significantly improved by integrated nutrientmanagement under well-watered as well as drought stress conditions. A substantial decrease in total drymatter and grain yield basis RUE was recorded from higher to lower plant nutrition rates, as the highest valueof RUE was found with treated plants of 250-120-125 kg NPK ha-1 + FYM at 15 t ha-1. Thus, our studydemonstrates that supplemental NPK with FYM is an effective strategy to boost the drought tolerance throughimproved RUE and biomass accumulation in maize.<br />In order to alleviate the drought adversities on maize (Zea mays L.)biomass accumulation and radiation use efficiency (RUE), a field study was conducted under drought stress levels of D1 = well-watered, D2 = drought stress at blister stage, D3 = drought stress at blister and dough stages; and integrated nutrition levels, N0 = control, N1 = NPK, 125-60-62 kg ha-1, N2 = NPK, 125-60-62 kg ha-1 + FYM at 10 t ha-1, N3 = NPK, 125-60-62 kg ha-1 + FYM at 15 t ha-1, N4 = NPK, 250-120-125 kg ha-1, N5 = NPK, 250-120-125 kg ha-1 + FYM at 10 t ha-1, N6 = NPK, 250-120-125 kg ha-1 + FYM at 15 t ha-1. Drought stress caused a significant decline in growth traits, interception of photosynthetically active radiation (PAR), RUE and finally biomass production. The highest leaf area index, leaf area duration, crop growth rate, net assimilation rate, interception of PAR and dry matter accumulation was recorded in plants applied with NPK (250-120-125 kg ha-1) in combination with FYM (15 t ha-1), whereas only NPK application did not significantly improve light interception and dry biomass production. Fraction of intercepted (Fi) radiation was significantly improved by integrated nutrient management under well-watered as well as drought stress conditions. A substantial decrease in total dry matter and grain yield basis RUE was recorded from higher to lower plant nutrition rates, as the highest value of RUE was found with treated plants of 250-120-125 kg NPK ha-1 + FYM at 15 t ha-1. Thus, our study demonstrates that supplemental NPK with FYM is an effective strategy to boost the drought tolerance through improved RUE and biomass accumulation in maize.

Details

ISSN :
13011111
Database :
OpenAIRE
Journal :
Turkish Journal Of Field Crops
Accession number :
edsair.doi.dedup.....f6861d682b7bba1b4e18cd0933a67d0e
Full Text :
https://doi.org/10.17557/tjfc.312370