Agronomic and Economic Response of Spring Wheat Cultivars to Ethephon

Khan, Arshad; Spilde, L. A.

doi:10.2134/agronj1992.00021962008400030010x

Cited by 12 publications

(10 citation statements)

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“…In several studies, later maturity (Ma and Smith, 1991;Moes and Stobbe, 1991;Taylor et al, 1991;Ma and Smith, 1992;Foster and Taylor, 1993) and higher leaf area (Ramos et al, 1989;van Sanford et al, 1989) followed pre-anthesis CCC and ethephon application. However, Khan and Spilde (1992) and Ma and Smith (1992) reported no such response in cereals. Oat types having inherent differences in plant stand structure differed in post-anthesis LAD, but less than in pre-anthesis LAD.…”

Section: Crop Management Effects On Duration Of Green Leaf Areamentioning

confidence: 94%

Crop Management Effects on Pre‐and Post‐Anthesis Changes in Leaf Area Index and Leaf Area Duration and their Contribution to Grain Yield and Yield Components in Spring Cereals

Peltonen‐Sainio

Forsman

Poutala

1997

J Agronomy Crop Science

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Seasonal changes in leaf area index (LAI) and leaf area duration (LAD, i.e. LAI integrated over cumulated degree days) have a marked effect on crop productivity. Three case experiments were conducted at Suitia (60°irN) and Viikki (60'13'N) Experimental Farms, University of Helsinki, Finland, to evaluate the possibilities of accelerating pre-anthesis expansion of leaf area and modifying pre-and post-anthesis LAD in spring cereals through crop management. Effects of time of incorporation of a green manure crop residue into the soil [conventional tillage (autumn ploughing and seed bed preparation in the spring), conservation tillage (sole spring tillage) with and without a green manure crop, common vetch {Vicia sativa l.)]and N fertilizer rate (0, 50, 100 kg N ha ') on LAI and pre-and post-anthesis LAD in wheat {Triticum aestivum L.) were studied in exp I; green manuring (common vetch) and N fertilizer rate (0,40, 70, 110, 150 kg N ha^') in barley {Hordeum vulgare L.), oat {Avena sativa L.), and wheat in exp II; and fohar application of chlormequat chloride (CCC) and ethephon in oat lines (dwarf, naked, modern, landrace) differing in canopy structure in exp III. Time of incorporation of the green manure crop residues into the soil (exp I), green manuring (exp II), N fertilizer rate (exps I and II), and selection for crop growth type (exp III), but not CCC and ethephon, modified LAI and LAD in spring cereals by affecting the rate of pre-anthesis expansion and postanthesis reduction in leaf area rather than by markedly prolonging the growth period. High rates of N fertilizer accelerated expansion of leaf area, especially prior to stem elongation, and resulted in high pre-anthesis LAD due to enhanced tiller growth (exps I and II) and more tillers per main shoot (exp I). Green manuring increased leaf expansion from the tillering stage most when combined with high N rate, and especially in barley (exp II), but no such effects were found in exp I. Use of a high N fertilizer rate (exps I and 11) and green manuring (exp II) also resulted in high post-anthesis LAD. Such modifications enabled higher rates of grain-and head-filling. and in exp 1 contributed to increased head weight and grain yield. Selection for inherent differences in growth type provided an additional possibility for manipulation of canopy structure and yield fonnation.

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Section: Crop Management Effects On Duration Of Green Leaf Areamentioning

confidence: 94%

Crop Management Effects on Pre‐and Post‐Anthesis Changes in Leaf Area Index and Leaf Area Duration and their Contribution to Grain Yield and Yield Components in Spring Cereals

Peltonen‐Sainio

Forsman

Poutala

1997

J Agronomy Crop Science

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“…These results are in keeping with those of Wiersma et af. (1986) and Khan & Spilde (1992) who found significant improvements in hectoliter mass following ethephon application. The improvements in hectoliter mass may be related to the increase in partitioning of assimilate to the grain following reduced stem growth.…”

Section: Rag Ismentioning

confidence: 98%

The effects of chlormequat chloride and ethephon on agronomic and quality characteristics of South African irrigated wheat

Ramburan¹,

Greenfield

2007

South African Journal of Plant and Soil

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“…Various applications of ethephon, mepiquat chloride and mixtures of CCC or mepiquat chloride with ethephon, enhanced formation, growth and survival of head bearing tillers of barley (Cartwright and Waddington 1981, Waddington and Cartwright 1986, Woodward and Marshall 1987, Ma and Smith 1991, Moes and Stobbe 1991, Ma and Smith 1992a and in wheat (Khan and Spilde 1992).…”

Section: Tillering Tiller Growth and Productivitymentioning

confidence: 99%

Plant growth regulators to manipulate oat stands

Rajala¹

2008

AFSci

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Plant growth regulators (PGRs) are exogenously applied chemicals that alter plant metabolism, cell division, cell enlargement, growth and development by regulating plant hormones or other biological signals. For example, some PGRs regulate stem elongation by inhibiting biosynthesis of gibberellins or through releasing ethylene. PGR effects are widely studied and reported on barley (Hordeum vulgare L.) and wheat (Triticum aestivum L.), whereas there are only a few reports addressing oat (Avena sativa L.). This is likely to be a result of smaller acreage and lower intensity of oat management and production and hence a reduced need for stem shortening by PGRs. However, this is not the case for all cereal producing regions and there exists a need to understand the potential application of PGRs to oat production. This paper represents a review of the potential of PGRs to regulate stem elongation and other biological traits governing plant stand structure and yield components, with special emphasis on oat and its responses to PGRs. Yield improvement requires more heads per unit land area, more grains per head or heavier grains. Of these yield-determining parameters, the number of head bearing tillers and grain numbers per head, compared with grain weight, are more likely to be improved by PGR application. In the absence of lodging, PGR may reduce grain yield due to potential reduction in mean grain weight and/or grain number. Cultivation systems aiming at extensive yields with intensive use of inputs likely benefit from PGR applications more often compared with low or moderate input cultivation, for which cost effectiveness of PGRs is not frequently reached.

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Agronomic and Economic Response of Spring Wheat Cultivars to Ethephon

Cited by 12 publications

References 0 publications

Crop Management Effects on Pre‐and Post‐Anthesis Changes in Leaf Area Index and Leaf Area Duration and their Contribution to Grain Yield and Yield Components in Spring Cereals

Crop Management Effects on Pre‐and Post‐Anthesis Changes in Leaf Area Index and Leaf Area Duration and their Contribution to Grain Yield and Yield Components in Spring Cereals

The effects of chlormequat chloride and ethephon on agronomic and quality characteristics of South African irrigated wheat

Plant growth regulators to manipulate oat stands

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