THE EFFECT OF WATER STRESS ON RADIATION INTERCEPTION, RADIATION USE EFFICIENCY AND WATER USE EFFICIENCY OF MAIZE IN A TROPICAL CLIMATE

Geneille E. GREAVES; Yu-Min WANG

doi:https://doi.org/10.17557/tjfc.311904

Makale detayları

THE EFFECT OF WATER STRESS ON RADIATION INTERCEPTION, RADIATION USE EFFICIENCY AND WATER USE EFFICIENCY OF MAIZE IN A TROPICAL CLIMATE

Yazarlar:

Geneille E. GREAVES | Yu-Min WANG

Yayıncı:

Society of Fields Crop Science

Dergi:

Turkish Journal Of Field Crops 2017 Vol.22 Issue 1, pp.114-125

Belge Tipi:

Makale

Yayın Tarihi:

5/2017

Belge Dili:

İngilizce

Document ID (Org No.):

2000636237

Sıklık:

İki Yıllık

pISSN:

1301-1111

DOI:

https://doi.org/10.17557/tjfc.311904

Özet:

 


This study was conducted to investigate the effect of deficit irrigation on radiation capture, radiation use
efficiency (RUE) and water use efficiency (WUE) in maize production, and to assess how these factors impact
biomass production in water stress environments. Five irrigation levels were investigated: a full irrigation
treatment with a water depth of 60 mm (I1), and four deficit irrigation treatments with depths of 50 (I2), 40 (I3),
30 (I4) and 20 mm (I5). Crop water stress index values indicated treatments I2 and I3 caused mild water stress
while I4 and I5 caused severe stress. Water deficits significantly (p<0.05) reduced leaf area index compared to
full irrigation. The reduction in biomass for I2 to I5 ranged between 7 and 43% relative to I1. In I1, the RUE
was 3.46 g MJ-1
, while mild and severe water stress significantly reduced it to 3.11 and 2.69 g MJ−1
,
respectively. A reduction in both intercepted photosynthetically active radiation and RUE contributed
significantly to biomass reduction. Mild and severe water stress improved the WUE within range of 2 and
25% and 10 and 34%, respectively. The results suggest that in mild water stress environments, high RUE aids
in minimizing production losses, and in cases of severe water stress, the reduced ability to capture and utilize
radiation is compensated by improving the WUE. 

.

 

This study was conducted to investigate the effect of deficit irrigation on radiation capture, radiation use efficiency (RUE) and water use efficiency (WUE) in maize production, and to assess how these factors impact biomass production in water stress environments. Five irrigation levels were investigated: a full irrigation treatment with a water depth of 60 mm (I1), and four deficit irrigation treatments with depths of 50 (I2), 40 (I3), 30 (I4) and 20 mm (I5). Crop water stress index values indicated treatments I2 and I3 caused mild water stress while I4 and I5 caused severe stress. Water deficits significantly (p<0.05) reduced leaf area index compared to full irrigation. The reduction in biomass for I2 to I5 ranged between 7 and 43% relative to I1. In I1, the RUE was 3.46 g MJ-1, while mild and severe water stress significantly reduced it to 3.11 and 2.69 g MJ−1, respectively. A reduction in both intercepted photosynthetically active radiation and RUE contributed significantly to biomass reduction. Mild and severe water stress improved the WUE within range of 2 and 25% and 10 and 34%, respectively. The results suggest that in mild water stress environments, high RUE aids in minimizing production losses, and in cases of severe water stress, the reduced ability to capture and utilize radiation is compensated by improving the WUE.

Makale detayları

THE EFFECT OF WATER STRESS ON RADIATION INTERCEPTION, RADIATION USE EFFICIENCY AND WATER USE EFFICIENCY OF MAIZE IN A TROPICAL CLIMATE

Yazarlar: Geneille E. GREAVES | Yu-Min WANG

Yayıncı: Society of Fields Crop Science

Dergi: Turkish Journal Of Field Crops 2017 Vol.22 Issue 1, pp.114-125

Belge Tipi: Makale

Yayın Tarihi: 5/2017

Belge Dili: İngilizce

Document ID (Org No.): 2000636237

Sıklık: İki Yıllık

pISSN: 1301-1111

DOI: https://doi.org/10.17557/tjfc.311904

Sayı

Yazarlar:

Geneille E. GREAVES | Yu-Min WANG

Yayıncı:

Society of Fields Crop Science

Dergi:

Turkish Journal Of Field Crops 2017 Vol.22 Issue 1, pp.114-125

Belge Tipi:

Makale

Yayın Tarihi:

5/2017

Belge Dili:

İngilizce

Document ID (Org No.):

2000636237

Sıklık:

İki Yıllık

pISSN:

1301-1111

DOI:

https://doi.org/10.17557/tjfc.311904