COUPLING OF DRY-MATTER AND NITROGEN ACCUMULATION IN RYEGRASS

被引：8

作者：

OVERMAN, AR

ROBINSON, DL

WILKINSON, SR

机构：

[1] Agricultural Engineering Department, University of Florida, Gainesville, Florida

[2] Agronomy Department, Louisiana State University, Baton Rouge, Louisiana

[3] Southern Piedmont Conservation Research Center, USDA-ARS, Watkinsville, Georgia

来源：

FERTILIZER RESEARCH | 1995年 / 40卷 / 02期

关键词：

ANNUAL RYEGRASS; DRY MATTER; LOGISTIC; MODEL; NITROGEN;

D O I：

10.1007/BF00750094

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The logistic model has proven very useful in relating dry matter production of warm season perennial forage grasses to applied nitrogen. A recent extension of the model coupled dry matter and plant N accumulation through a common response coefficient c. The objective of this analysis was to apply the extended logistic model to cool season Gulf annual ryegrass (Lolium multiflorum Lam.) and to establish a common response coefficient c between accumulation of dry matter and plant N. Analysis of variance established the validity of this hypothesis. The model accurately described response of dry matter, plant N removal, and plant N concentration to applied N, with an overall correlation coefficient of 0.9954. Furthermore, the model closely described the relationship between yield and plant N removal, as well as between plant N concentration and plant N removal. The logistic equation is well-behaved and simple to use on a pocket calculator. It can be used to estimate yields and plant N removal in evaluation of agricultural production and environmental quality.

引用

页码：105 / 108

页数：4

共 10 条

[1]

Cooper J.P, Potential production and energy conversion in temperate and tropical grasses, Herbage abstracts: 2-15, (1970)

[2]

France J., Thornley J.H.M, Mathematical Models in Agriculture, (1984)

[3]

Hosmer D.W, Lemenshow L., Applied Logistic Regression, (1989)

[4]

Mengel K., Kirkby E.A, Principles of Plant Nutrition, (1987)

[5]

Overman A.R, Evers G.W, Estimation of yield and nitrogen removal by bermudagrass and bahiagrass, Trans. Am. Soc. Agric. Eng., 35, pp. 207-210, (1992)

[6]

Overman A.R, Wilkinson S.R, Model evaluation for perennial grasses in the southern United States, Agronomy Journal, 84, pp. 523-529, (1992)

[7]

Overman A.R, Martin F.G, Wilkinson S.R, A logistic equation for yield response of forage grass to nitrogen, Communications in Soil Science and Plant Analysis, 21, pp. 595-609, (1990)

[8]

Overman A.R, Neff C.R, Wilkinson S.R, Martin F.G, Water, harvest interval, and applied nitrogen effects on forage yield of bermudagrass and bahiagrass, Agronomy Journal, 82, pp. 1011-1016, (1990)

[9]

Overman A.R, Wilkinson S.R, Wilson D.M, An extended model of forage grass response to applied nitrogen, Agron. J., 86, pp. 617-620, (1994)

[10]

Robinson D.L, Wheat K.G, Hubbert N.L, Nitrogen fertilization influences on Gulf ryegrass yields, quality, and nitrogen recovery from Olivier silt loam soil. Louisiana Agric. Exp. Stn. Bull 784, (1987)

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