Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Root growth of cauliflower (Brassica oleracea L. botrytis) under unstressed conditions: Measurement and modelling
Autore:
Kage, H; Kochler, M; Stutzel, H;
Indirizzi:
Univ Hannover, Inst Vegetable & Fruit Crops, D-30419 Hannover, Germany Univ Hannover Hannover Germany D-30419 Crops, D-30419 Hannover, Germany
Titolo Testata:
PLANT AND SOIL
fascicolo: 1-2, volume: 223, anno: 2000,
pagine: 131 - 145
SICI:
0032-079X(2000)223:1-2<131:RGOC(O>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-YIELDING CROPS; WINTER-WHEAT ROOTS; ZEA-MAYS L; FIELD CONDITIONS; SHOOT GROWTH; SIMULATION-MODEL; MAIZE CULTIVARS; WATER-UPTAKE; SOIL TYPE; MINIRHIZOTRON;
Keywords:
cauliflower; dry matter production; model; minirhizotron method; roots;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
62
Recensione:
Indirizzi per estratti:
Indirizzo: Kage, H Univ Hannover, Inst Vegetable & Fruit Crops, Herrenhaeuser Str 2, D-30419 Hannover, Germany Univ Hannover Herrenhaeuser Str 2 Hannover Germany D-30419 ermany
Citazione:
H. Kage et al., "Root growth of cauliflower (Brassica oleracea L. botrytis) under unstressed conditions: Measurement and modelling", PLANT SOIL, 223(1-2), 2000, pp. 131-145

Abstract

Root observations were carried out on cauliflower using the minirhizotron and the soil core method in two years on two locations with different soil types, a loess loam and a humic loamy sand. Total root length (RL) (cm cm(-2)) of cauliflower was correlated to total shoot dry weight (W-sh) (g m(-2)) RL=0.0124(+/- 0.005)s*W-sh, r(2)=0.76. There was an acceptable correlation (r(2)=0.88) between the minirhizotron and the soil core methods for the sub-soil data, whereas the minirhizotron method underestimated rooting intensity for the top soil. Changes in rooting depth over time could be described for both soil types using a segmented function of temperature sum, consisting of an early exponential and a later linear phase. The increase of rooting depth during the linear phase was 0.107(+/- 0.01) cm degrees C-1 d(-1). A simple descriptive root growth model based on the assumptions of a negative exponential decline of root length density (RLD) with soil depth, of a fixed ratio of RLD at the top of the soil profile and at rooting depth (r(RLD)) and of a fixed fraction of dry matter increase allocated to fine-roots(f(fR)) was formulated and used to describe the temporal and spatial variation of RLD found in the field. Slightly different estimates of f(f)R and of r(R)LD could be found for the different soil types, indicating a higher fraction of fine-root dry matter for the loess loam soil and a somewhat deeper root system for the humic loamy sand soil. A cross validation using the parameter values obtained from adjusting to the rooting data of one soil type for predicting RLD values of the other soil type, however, indicated that still quite satisfactory estimates (r(2)=0.91 and 0.95) of RLD could be obtained.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 11:28:23