Growth, development, and composition of temperate forage legumes and grasses in varying environments

Ohlsson, C.

doi:10.31274/rtd-180813-11768

Cited by 6 publications

(7 citation statements)

References 54 publications

(154 reference statements)

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“…Clovers may differ from grasses in their growth response to temperature. Irrespective of similar optimum growth temperatures for grasses and clovers, the response to temperatures below and above optimum may be substantially different (Ohlsson, 1991). The temperature index may be overestimated in leys with high clover content.…”

Section: Discussionmentioning

confidence: 95%

Effects of Cattle Slurry on the Growth Potential and Clover Proportion of Organically Managed Grass-Clover Leys

Steinshamn¹

2001

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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A Ê s, Norway). Effects of cattle slurry on the growth potential and clover proportion of organically managed grass -clover leys.The growth potential of grass -clover leys as in uenced by cattle slurry application and clover content was studied in eld experiments during three growing seasons at four locations. A grassland growth model was used to quantify growth potential and to separate the in uence of weather variables from factors related to the plant stand. Application of cattle slurry increased the initial relative growth rate (R s ), on average from 0.21 to 0.23 g g ¼ 1 day ¼ 1 of the spring growth. In regrowth the effect of cattle slurry was less pronounced. The effect of cattle slurry declined with increasing R s of the unfertilized treatment and rose with increasing rate of ammonium N applied by the slurry. The positive response to cattle slurry application on R s was unaffected by the clover proportion in the spring growth, while in regrowth it tended to diminish with increasing clover proportion. A rising clover proportion enhanced the growth potential of the ley in both growth periods. In spring growth, highest R s was found at an average clover content of approximately 55%, while in regrowth R s increased linearly with the clover content. On average, slurry application reduced the clover proportion of dry matter yield by 7%-units in spring growth and 13%-units in regrowth.

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Section: Discussionmentioning

confidence: 95%

Effects of Cattle Slurry on the Growth Potential and Clover Proportion of Organically Managed Grass-Clover Leys

Steinshamn¹

2001

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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“…Kultivarji lucerne, ki so izkazovali večjo kakovost krme med rastjo, se namreč niso razlikovali po razvojni fazi od tistih z manjšo kakovostjo. Linearna oblika časovnega poteka PRF, ugotovljena v tej raziskavi, se sklada z nekaterimi drugimi (Ohlsson, 1991;Božičković in sod., 2013) oziroma od njih odstopa (Kalu in Fick, 1981;Ohlsson, 1991). V teh zadnjih primerih so poteki podobni krivuljam kvadratne funkcije.…”

Section: Modelirani čAsovni Poteki Prf Ter Vsebnosti Sb Ndv In Nelunclassified

“…Prvo bi lahko povezali s sušo v tem času, saj ta povečuje razmerje med listi in stebli s tem, da bolj zavira rast slednjih (Fick in sod. 1988 Časovni poteki NDV v literaturi so, enako kot poteki v tej raziskavi, linearni oziroma so rahlo ukrivljeni (Kühbauch in Pletl, 1981;Ohlsson, 1991;Hall in sod., 2000). Sulc in sod.…”

Section: Modelirani čAsovni Poteki Prf Ter Vsebnosti Sb Ndv In Nelunclassified

Herbage Yield, Morphological Development and Nutritive Value of Lucerne During Growth Season in Central Slovenia: Analysis of Time Patterns

Čop

Košmelj

Žnidaršič

et al. 2018

AAS

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IZVLEČEKČas košnje je zelo pomemben dejavnik količine in kakovosti pridelka krme enovrstnih koševin. Zato smo želeli analizirati časovne poteke pridelka zelinja, morfološkega razvoja in parametrov kakovosti lucerne med rastno sezono ter jih povezati s časom košnje. Poljski poskus v split-plot zasnovi z dvema blokoma smo izvedli v Ljubljani leta 2016. Glavne parcele so predstavljale 4 rastne cikluse (C1-C4), podparcele pa 9 tedenskih terminov za merjenje pridelka in vzorčenje zelinja. Rast lucerne je bila v prvi polovici rastne sezone boljša kot v drugi. Pridelek zelinja je v zadnjih dveh ciklusih hitro dosegel maksimum in se nato zmanjševal. Statistična analiza je pokazala, da so linearni regresijski modeli primerni za opisovanje časovnih potekov naslednjih spremenljivk: morfološkega razvoja (PRF), surovih beljakovin (SB), vlaken, netopnih v nevtralnem detergentu (NDV) in neto energije za laktacijo (NEL). Morfološki razvoj lucerne je bil hitrejši poleti kot pomladi ali jeseni, vendar je po tej lastnosti med ciklusi izrazito odstopal samo prvi. Kakovost lucerne je bila predvsem zaradi počasnejšega razvoja v celoti najboljša v C1, kar se je bolj odrazilo pri NDV in NEL kot pri SB. C1 je bil po kakovosti lucerne enakovreden samo C4 na začetku rasti. Upoštevajoč pridelek in vsebnost NEL je bila optimalna starost lucerne ob košnji od 28 do 35 dni spomladi in poleti ter od 35 do 42 dni jeseni.Ključne besede: lucerna; pridelek; morfološki razvoj; hranilna vrednost; časovni potek ABSTRACT HERBAGE YIELD, MORPHOLOGICAL DEVELOPMENT AND NUTRITIVE VALUE OF LUCERNE DURING GROWTH SEASON IN CENTRAL SLOVENIA: ANALYSIS OF TIME PATTERNSCutting time is a pivotal factor affecting herbage yield and nutritive value of forage crop monocultures. Therefore, our objectives in this lucerne study were to analyse temporal patterns of herbage yield, morphological development and quality parameters over growth season, and to relate these patterns to the time of cutting. A field experiment in split-plot design with two block replications was conducted in Ljubljana in 2016. Four growth cycles (C1-C4) were assigned to the main plots, and nine weekly intervals at which herbage yield was measured and herbage samples taken were assigned to the sub-plots. Dry-matter herbage yield accumulated faster during the first half of the season than during the second one. It peaked early in each of the last two growth cycles and after that started to decrease. Statistical analysis showed that linear regression models are acceptable to describe time patterns of morphological development stages (MSW) and contents of crude protein (CP), neutral detergent fibre (NDF) and net energy for lactation (NEL). MSW increased faster during the summer than during the spring or autumn, but only C1 was distinct in this pattern. Lucerne forage quality was generally the highest in C1 mainly due to slower morphological development. This high quality reflected more in NDF and NEL than in CP. In respect of the quality, only C4 at the beginning of the growth was equivalent to C1. Cons...

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“…Ο Ohlsson (1991) διαπίστωσε ότι μια αύξηση στη θερμοκρασία από 10 έως 20 o C μείωσε την πεπτικότητα, στο ίδιο στάδιο ωριμότητας, κατά επτά (7) και πέντε (5) ποσοστιαίες μονάδες στο κόκκινο τριφύλλι (Trifolium pratense L.) και στο λειμώνιο φλέο (Phleum pratenese L.), αντίστοιχα. Κάθε αύξηση 1 o C στη θερμοκρασία, γενικά, μειώνει την πεπτικότητα της βοσκήσιμης ύλης 0,3 έως 0,7% χωρίς να επηρεάσει σημαντικά τη συγκέντρωση των ΑΟ (Buxton and Fales, 1994).…”

Section: τοπογραφική θέσηunclassified

Εποχική Και Καθ' Ύψος Διακύμανση Της Χημικής Σύστασης Και Της Θρεπτικής Αξίας Βοσκήσιμης Ύλης Λιβαδιών Της Ηπείρου Και Απεικόνισή Της Σε Γεωγραφικό Σύστημα Πληροφοριών

Ρούκος¹

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Growth, development, and composition of temperate forage legumes and grasses in varying environments

Cited by 6 publications

References 54 publications

Effects of Cattle Slurry on the Growth Potential and Clover Proportion of Organically Managed Grass-Clover Leys

Effects of Cattle Slurry on the Growth Potential and Clover Proportion of Organically Managed Grass-Clover Leys

Herbage Yield, Morphological Development and Nutritive Value of Lucerne During Growth Season in Central Slovenia: Analysis of Time Patterns

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