Effects of timing of nitrogen fertilization on shoot development in peach (Prunus persica) trees

Lobit, Philippe; Soing, P.; Génard, Michel; Habib, Robert H.

doi:10.1093/treephys/21.1.35

Cited by 32 publications

(28 citation statements)

References 5 publications

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“…Farmers cannot pinpoint these conceptions through trial and error since N fertilisation experiments need several consecutive years in perennial crops. However, a few conceptions were right such as the role of N fertiliser to increase tree vigour, particularly in the case of heavy fruit load (Elfving, 1988;Marsh et al, 1996;Lobit et al, 2001;Drake et al, 2002). Our results on the importance of farmers' conceptions are in accordance with the findings of different authors (Hubert et al, 1993;Keating and McCown, 2001;Darré et al, 2004).…”

Section: Farmers' Fertilisation Conceptions and Agronomic Knowledgesupporting

confidence: 91%

Survey-based analysis of irrigation and N fertilisation practices in apple orchards

Nesme

Bellon²,

Lescourret

et al. 2006

Agron. Sustain. Dev.

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. Survey-based analysis of irrigation and N fertilisation practices in apple orchards. Agronomy for Sustainable Development, Springer Verlag/EDP Sciences/ INRA, 2006, 26 (3), pp.215-225. 215 Agron. Sustain. Dev. 26 (2006 Abstract -Farmers are increasingly required to justify their practices and to change their technical management approach due to the development of integrated production, new regulations and private standards. The feasibility of these changes can be assessed by analysing the practices of farmers. Here, we analysed the practices of farmers in apple orchards from an agronomic viewpoint, focusing on irrigation and N fertilisation. Our study is based on interviewing farmers about their practices and factors that influence their decisions. Interviews were supported by model-generated irrigation and fertilisation schedules related to the considered plots. Fertilisation data recorded over a two-year period were compared to data from interviews. Our results show that (1) irrigation practices were highly dependent on pest control practices; (2) chemical spraying against the codling moth strongly influenced irrigation frequency; (3) irrigation practices were dependent on irrigation devices; and (4) fertilisation practices were highly dependent on the conceptions that farmers had about the role of N fertilisers. These conceptions were associated with timing, fertiliser formula and modulation rules. Based on data recorded by farmers over a two-year period, fertilisation practices were highly variable. Likewise, these data also differed from data collected during interviews. Overall, our findings underline the importance of considering interactions between cultural practices and farmers conceptions in order to understand farmers practices. It also stressed the need to consider data recorded by the farmers themselves only as a partial source of information and to design better interviewing procedures with farmers.apple orchard / farmers' practices / farmers' conceptions / interviews / data recorded by farmers

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Section: Farmers' Fertilisation Conceptions and Agronomic Knowledgesupporting

confidence: 91%

Survey-based analysis of irrigation and N fertilisation practices in apple orchards

Nesme

Bellon²,

Lescourret

et al. 2006

Agron. Sustain. Dev.

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“…Fidelia, the number of formed shoots depended on N availability in the period following the bud break. Furthermore, the proportion of shoots that showed the second or third development stage depended on N availability at the beginning of that stage (LOBIT et al 2001).…”

Section: Resultsmentioning

confidence: 99%

Effect of nitrogen, phosphorus, potassium fertilizers and manure on growth and productivity of the peach cultivars Springtime and Redhaven

Chatzitheodorou¹,

Sotiropoulos²,

Mouhtaridou³

et al. 2004

Hort. Sci. (Prague)

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The response of the peach cvs. Springtime and Redhaven to nitrogen, phosphorus, potassium fertilizers and manure is reported. The research was conducted during a period of 10 years. The following fertilizer combinations were used: control (no fertilization), N, P, K, NP, NK, PK, PK, manure, N + manure, P + manure, K + manure, NP + manure, NK + manure, <br />PK + manure, NPK + manure. The following measurements were performed: a) productivity (kg/tree); b) mean fruit weight (g); c) fruit number per tree; d) fruit setting (%); e) trunk circumference (cm), and f) shoot weight (kg) removed by pruning. It is concluded from the results that the two cvs. did not always respond to the various treatments in the same way. Application of N plus manure to peach trees of the cv. Springtime resulted in the highest productivity. The higher productivity of the cv. Redhaven was recorded in the treatments N and NPK. The lowest productivity, fruit number, total trunk circumference and shoot weight removed by pruning of both cvs. were recorded in the control and PK treatments in comparison with all the others. Fruit setting of the cv. Springtime was highest in the NP + manure treatment, followed by the PK + manure one. Fruit setting of the cv. Redhaven was higher in the PK + manure, NK + manure and K + manure treatments. Shoot weight that was removed by pruning was highest in the NK + manure treatment for the cv. Springtime, whereas for the cv. Redhaven it was highest in the N + manure treatment in comparison with the remaining ones.  

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“…Therefore, our soil temperature data were converted to belowground GDD assuming a base temperature of 10°C. A traditional use of GDD is to calculate the cumulative sum of all positive degree days over a year, with temperatures below the base temperature accumulating no degree days (CASTELAN-ESTRADA et al, 2002;LOBIT et al, 2001;LUOMAJOKI, 1995). We tested the accumulation of belowground GDD over the 14-d growing period.…”

Section: Discussionmentioning

confidence: 99%

Soil Temperature and Precipitation Affect the Rooting Ability of Dormant Hardwood Cuttings of Populus

Zalesny¹,

Hall

Bauer³

et al. 2005

Silvae Genetica

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In addition to genetic control, responses to environmental stimuli affect the success of rooting. Our objectives were to: 1) assess the variation in rooting ability among 21 Populus clones grown under varying soil temperatures and amounts of precipitation and 2) identify combinations of soil temperature and precipitation that promote rooting. The clones belonged to five genomic groups ([P. trichocarpa Torr. & Gray x P. deltoides Bartr. ex Marsh] x P. deltoides ‘BC’; P. deltoides ‘D’; P. deltoides x P. maximowiczii A. Henry ‘DM’; P. deltoides x P. nigra L. ‘DN’; P. nigra x P. maximowiczii ‘NM’). Cuttings, 20 cm long, were planted in Iowa and Minnesota, USA, in randomized complete blocks at 1.2- x 2.4-m spacing across three planting dates during 2001 and 2002. Soil temperatures were converted to belowground growing degree days (GDD) (base temperature = 10°C) accumulated over 14 days. Genomic groups responded similarly for root dry weight, number of roots, total root length, and mean root length, that increased as belowground GDD increased. Belowground GDD and precipitation governed rooting throughout the 14-d growing period. A minimum of four days above 14°C, along with sufficiently dispersed precipitation (e.g. no more than 3 d without a precipitation event), were needed to sustain aboveaverage rooting. Therefore, we recommend using a base temperature of 14°C for future models estimating belowground GDD in northern temperate zones.

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Effects of timing of nitrogen fertilization on shoot development in peach (Prunus persica) trees

Cited by 32 publications

References 5 publications

Survey-based analysis of irrigation and N fertilisation practices in apple orchards

Survey-based analysis of irrigation and N fertilisation practices in apple orchards

Effect of nitrogen, phosphorus, potassium fertilizers and manure on growth and productivity of the peach cultivars Springtime and Redhaven

Soil Temperature and Precipitation Affect the Rooting Ability of Dormant Hardwood Cuttings of Populus

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