Water-Use Efficiency (WUE) and Change in the Yield-Response Factor (Ky) of Cotton Irrigated by an Irrigation Drip System

Ahmet ERTEK

Makale detayları

Water-Use Efficiency (WUE) and Change in the Yield-Response Factor (Ky) of Cotton Irrigated by an Irrigation Drip System

Yazarlar:

Ahmet ERTEK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2001 Vol.25 Issue 2, pp.111-118

Belge Tipi:

Makale

Yayın Tarihi:

1/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000809636

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Anahtar kelimeler:

Özet:

 

This study was conducted to investigate the effect of water-use efficiency and changes in the yield-response factor of cotton irrigated with an irrigation drip system. The amount of water applied was based on free surface evaporation from a screened Class-A Pan. Irrigation treatments consisted of two different irrigation intervals (I1: 5; I2: 10 days), three plant-pan coefficients (Kcp1: 0.75; Kcp2: 0.90, Kcp3: 1.05) and two different soil surface wetting percentages (P1: 0.70 and P2: based on cover percentage of the crop). The first irrigation was applied when the available soil water content in the 120 cm of the soil profile was 40%.  The results revealed that total water use efficiency (TWUE) and irrigation water use efficiency (IWUE) varied from 0.58 to 0.62 kg/da/mm and 0.755 to 0.94 kg/da/mm, respectively. The ratio of irrigation water measured to evapotranspiration (I/ET) was 67 - 72.5%. The seasonal Ky value of cotton was 0.70. It can be concluded that under similar climate conditions, relative irrigation efficiency values can be used for planning drip irrigation, and relative yield decrease in cotton against deficit irrigation water can be estimated by using the yield-response factor (1 - Y / Ym) = 0.70 (1 - ET / ETm).

 

This study was conducted to investigate the effect of water-use efficiency and changes in the yield-response factor of cotton irrigated with an irrigation drip system. The amount of water applied was based on free surface evaporation from a screened Class-A Pan. Irrigation treatments consisted of two different irrigation intervals (I1: 5; I2: 10 days), three plant-pan coefficients (Kcp1: 0.75; Kcp2: 0.90, Kcp3: 1.05) and two different soil surface wetting percentages (P1: 0.70 and P2: based on cover percentage of the crop). The first irrigation was applied when the available soil water content in the 120 cm of the soil profile was 40%.  The results revealed that total water use efficiency (TWUE) and irrigation water use efficiency (IWUE) varied from 0.58 to 0.62 kg/da/mm and 0.755 to 0.94 kg/da/mm, respectively. The ratio of irrigation water measured to evapotranspiration (I/ET) was 67 - 72.5%. The seasonal Ky value of cotton was 0.70. It can be concluded that under similar climate conditions, relative irrigation efficiency values can be used for planning drip irrigation, and relative yield decrease in cotton against deficit irrigation water can be estimated by using the yield-response factor (1 - Y / Ym) = 0.70 (1 - ET / ETm).

Makale detayları

Water-Use Efficiency (WUE) and Change in the Yield-Response Factor (Ky) of Cotton Irrigated by an Irrigation Drip System

Yazarlar:

Ahmet ERTEK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2001 Vol.25 Issue 2, pp.111-118

Belge Tipi:

Makale

Yayın Tarihi:

1/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000809636

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Turk. J. Agric. For.

25

(2001)

111-118. Full text: pdf Other articles published in the same issue: Turk. J. Agric. For.

vol.25

iss.2.

Sayı

Makale detayları

Water-Use Efficiency (WUE) and Change in the Yield-Response Factor (Ky) of Cotton Irrigated by an Irrigation Drip System

Yazarlar: Ahmet ERTEK

Yayıncı: TUBITAK

Dergi: Turkish Journal of Agriculture and Forestry 2001 Vol.25 Issue 2, pp.111-118

Belge Tipi: Makale

Yayın Tarihi: 1/2001

Belge Dili: Türkçe

Document ID (Org No.): 2000809636

Sıklık: İki Aylık

eISSN: 1303-6173

pISSN: 1300-011X

Turk. J. Agric. For.

25

(2001)

111-118. Full text: pdf Other articles published in the same issue: Turk. J. Agric. For.

vol.25

iss.2.

Sayı

Yazarlar:

Ahmet ERTEK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2001 Vol.25 Issue 2, pp.111-118

Belge Tipi:

Makale

Yayın Tarihi:

1/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000809636

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X