NDLI: Impact of crop rotation and minimum tillage on water use efficiency of irrigated cotton in a Vertisol

Content Provider	Springer Nature Link
Author	Tennakoon, S. B. Hulugalle, N. R.
Copyright Year	2006
Abstract	Crop water use efficiency of irrigated cotton was hypothesized to be improved by a combination of minimum tillage and sowing a wheat (Triticum aestivum L.) rotation crop. This hypothesis was evaluated in a Vertisol near Narrabri, Australia from 1997 to 2003. The experimental treatments were: continuous cotton sown after conventional or minimum tillage and minimum-tilled cotton–wheat. Soil water content was measured with a neutron moisture meter, and runoff with trapezoidal flumes. Application efficiency of irrigation water was estimated as the amount of infiltrated water/total amount applied. Plant available water was estimated using the maximum and minimum soil water storage during the growing season. Evapotranspiration was estimated with the water balance method using measured and simulated soil water data. Seasonal evapotranspiration was partitioned into that coming from rainfall, irrigation and stored soil water. Crop water use efficiency was calculated as cotton lint yield per hectare/seasonal evapotranspiration. Rotation of cotton with wheat and minimum tillage improved water use efficiency in some years and application efficiency in all years. Average seasonal evapotranspiration was higher with minimum tillage than with conventional tillage. In years when cotton was sown in all plots, average cotton crop water use efficiencies were 0.23, 0.23 and 0.22 kg (lint)/m3 for minimum-tilled cotton–wheat and continuous cotton, and conventionally tilled continuous cotton, respectively. In-season rainfall efficiency, transpiration and soil evaporation were unaffected by cropping system.
Starting Page	45
Ending Page	52
Page Count	8
File Format	PDF
ISSN	03427188
Journal	Irrigation Science
Volume Number	25
Issue Number	1
e-ISSN	14321319
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-05-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Forestry Soil Science & Conservation Plant Sciences Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Water Science and Technology

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