Toward better water management of Bollgard II cotton

摘要

The release of Bollgard II cotton varieties has required efficient water management of a plant that can produce very high yields cpmbined with a main stem that is rafely tipped by insects and has a very high fruit retention. So a high boll load early in flowering can lead to pre-mature cutout and lbwer yields. The aim of our research was to tailor irrigation scheduling that could combine soil and plant based measurements of plant stress to optimise the yield and water use efficiency of these high retention varieties. Summarised is research on furrow irrigated cotton in large scale plots over the past Three season on a cracking clay soil with 200 mm of available water.