Early sowing with wheat cultivars of suitable maturity increases grain yield of spring wheat in a short season environment.

NJ KERR, KHM SIDDIQUE, RJ DELANE

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Abstract

Eleven field trials were sown in the north-eastern wheatbelt of Western Australia to test the hypothesis that if wheat cultivars with suitable maturity are sown earlier than current practice, then higher grain yields will be achieved.

The experiments included time of sowing treatments that ranged from early May to late June in 1988, 1989 and 1990. Seven commercial cultivars with a wide range of developmental patterns and maturities were used.

Sowing between mid May and early June produced the highest grain yields. For plantings after early June, yields declined by approximately 250 kg/ha (15%) per week. Delayed sowing caused a decrease in dry matter and kernel number (per m2). In general this reduction in kernel number was not compensated by an improvement in kernel weight.

At early times of sowing, the medium-long season cultivars generally had higher yields than short season cultivars. The short season cultivars were the highest yielding cultivars at the late times of sowing. These results suggest that cultivars should be chosen to suit the seasonal break, which may vary from late April to mid June. As a consequence, farmers should be encouraged to retain a number of cultivars with differing maturities suited to a range of planting times.

Original languageEnglish
Pages (from-to)717-723
Number of pages7
JournalAustralian Journal of Experimental Agriculture
Volume32
Issue number6
DOIs
Publication statusPublished - 1992

Cite this

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title = "Early sowing with wheat cultivars of suitable maturity increases grain yield of spring wheat in a short season environment.",
abstract = "Eleven field trials were sown in the north-eastern wheatbelt of Western Australia to test the hypothesis that if wheat cultivars with suitable maturity are sown earlier than current practice, then higher grain yields will be achieved.The experiments included time of sowing treatments that ranged from early May to late June in 1988, 1989 and 1990. Seven commercial cultivars with a wide range of developmental patterns and maturities were used.Sowing between mid May and early June produced the highest grain yields. For plantings after early June, yields declined by approximately 250 kg/ha (15{\%}) per week. Delayed sowing caused a decrease in dry matter and kernel number (per m2). In general this reduction in kernel number was not compensated by an improvement in kernel weight.At early times of sowing, the medium-long season cultivars generally had higher yields than short season cultivars. The short season cultivars were the highest yielding cultivars at the late times of sowing. These results suggest that cultivars should be chosen to suit the seasonal break, which may vary from late April to mid June. As a consequence, farmers should be encouraged to retain a number of cultivars with differing maturities suited to a range of planting times.",
keywords = "TIME, ANTHESIS, WHEAT CULTIVARS, GRAIN YIELD",
author = "NJ KERR and KHM SIDDIQUE and RJ DELANE",
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language = "English",
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journal = "Australian Journal of Experimental Agriculture",
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TY - JOUR

T1 - Early sowing with wheat cultivars of suitable maturity increases grain yield of spring wheat in a short season environment.

AU - KERR, NJ

AU - SIDDIQUE, KHM

AU - DELANE, RJ

PY - 1992

Y1 - 1992

N2 - Eleven field trials were sown in the north-eastern wheatbelt of Western Australia to test the hypothesis that if wheat cultivars with suitable maturity are sown earlier than current practice, then higher grain yields will be achieved.The experiments included time of sowing treatments that ranged from early May to late June in 1988, 1989 and 1990. Seven commercial cultivars with a wide range of developmental patterns and maturities were used.Sowing between mid May and early June produced the highest grain yields. For plantings after early June, yields declined by approximately 250 kg/ha (15%) per week. Delayed sowing caused a decrease in dry matter and kernel number (per m2). In general this reduction in kernel number was not compensated by an improvement in kernel weight.At early times of sowing, the medium-long season cultivars generally had higher yields than short season cultivars. The short season cultivars were the highest yielding cultivars at the late times of sowing. These results suggest that cultivars should be chosen to suit the seasonal break, which may vary from late April to mid June. As a consequence, farmers should be encouraged to retain a number of cultivars with differing maturities suited to a range of planting times.

AB - Eleven field trials were sown in the north-eastern wheatbelt of Western Australia to test the hypothesis that if wheat cultivars with suitable maturity are sown earlier than current practice, then higher grain yields will be achieved.The experiments included time of sowing treatments that ranged from early May to late June in 1988, 1989 and 1990. Seven commercial cultivars with a wide range of developmental patterns and maturities were used.Sowing between mid May and early June produced the highest grain yields. For plantings after early June, yields declined by approximately 250 kg/ha (15%) per week. Delayed sowing caused a decrease in dry matter and kernel number (per m2). In general this reduction in kernel number was not compensated by an improvement in kernel weight.At early times of sowing, the medium-long season cultivars generally had higher yields than short season cultivars. The short season cultivars were the highest yielding cultivars at the late times of sowing. These results suggest that cultivars should be chosen to suit the seasonal break, which may vary from late April to mid June. As a consequence, farmers should be encouraged to retain a number of cultivars with differing maturities suited to a range of planting times.

KW - TIME

KW - ANTHESIS

KW - WHEAT CULTIVARS

KW - GRAIN YIELD

U2 - 10.1071/EA9920717

DO - 10.1071/EA9920717

M3 - Article

VL - 32

SP - 717

EP - 723

JO - Australian Journal of Experimental Agriculture

JF - Australian Journal of Experimental Agriculture

SN - 0816-1089

IS - 6

ER -