CHRONOBIOLOGICAL ASPECTS OF PESTICIDE LOAD OPTIMIZATION IN SALIX VIMINALIS L. PLANTINGS OF INTENSIVE TYPE

Bulletin of Nizhnevartovsk State University ◽

10.36906/2311-4444/19-2/06 ◽

2019 ◽

pp. 43-50

Author(s):

A. A Afonin

Keyword(s):

Harmonic Analysis ◽

Seasonal Dynamics ◽

Shoot Growth ◽

Level Structure ◽

Oscillation Period ◽

Salix Viminalis ◽

Load Optimization ◽

Daily Increment ◽

Pesticide Load ◽

Seasonal Biorhythms

The article considers common osier from the utilitarian perspective and addresses the necessity to applyprolonged-action pesticides in the plantings of intensive type. To reduce the pesticide load, it is proposed to schedule agroforestry activities taking into account the seasonal dynamics of annual shoot growth. The study aims to identify patterns of seasonal dynamics of daily increment of annual shoots of common osier, using such methods as selection, structural-morphological methods, and harmonic analysis. The object of the study is a model inbred population of common osier. It was found that the seasonal dynamics of daily shoot growth ΔL(t) is cyclic. A three-level structure of seasonal biorhythms of daily shoot growth wasdiscovered. The contribution of lower harmonics with the oscillation period of 32 to 96 days to the total cyclicity ΔL(t) was 65%. The contribution of the medium harmonics with the oscillation period of 16 to 24daysto the total cyclicity ΔL(t) was 23%. The contribution of higher harmonics with the oscillation period of less than 14 days to the total cyclicity ΔL(t) was 6%. To optimize the pesticide load in the plantings of common osier, it is recommended to take into account the biorhythms of shoot growth with a frequency of fluctuations from 16 to 24 days.

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Structural analysis of seasonal dynamics of daily growth of annual shoots of woolly-stemmed willow

Bulletin of Science and Practice ◽

10.33619/2414-2948/40/01 ◽

2019 ◽

Vol 5 (3) ◽

pp. 11-21 ◽

Cited By ~ 1

Author(s):

A. Afonin ◽

I. Vikhrova

Keyword(s):

Structural Analysis ◽

Seasonal Dynamics ◽

Shoot Growth ◽

High Amplitude ◽

Oscillation Period ◽

Daily Growth ◽

Cyclic Oscillation ◽

Level Of Significance ◽

Low Amplitude ◽

Period Of Oscillation

Given the complex characteristics of woolly–stemmed willow. The necessity of studying the regularities of seasonal dynamics of daily growth of annual shoots is substantiated. The study used material from the model inbred-clone population. Empirical data were processed using structural–harmonic analysis methods. It was found that the seasonal dynamics of the daily growth of shoots is cyclic quasi–periodic. Empirical series of dynamics at the highest level of significance are approximated by sums of elementary harmonics with a period of oscillation of 9.2 to 92.0 days. Revealed high-amplitude harmonic with the oscillation period of 23.0 to 92.0 day and low amplitude with a period of oscillation of 9.2 to 18.4 days. On all the studied shoots only the fourth harmonics coincide with the oscillation period of 23.0 days. The main contribution to the seasonal dynamics of shoot growth is made by three high-amplitude harmonics, which form two main signals with oscillation periods of 23 and 36 days. Other harmonics have a modulating effect on the seasonal dynamics of shoot growth. The first harmonics with a period of oscillation 92.0 days determine the nonlinearity of the seasonal trend of growth of shoots. Higher harmonics with a period of oscillation of 9.2 to 15.3 days form the resulting quasi–cyclic oscillation. Significant interclonal and intraclonal differences in the rhythm of daily growth of annual shoots were not revealed. On this basis, the proposed recommendations for agroforestry–technical events in the plantings of woolly–stemmed willow.

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Shoot growth in willow (Salix viminalis) in relation to abscisic acid, plant water status and photoperiod

Physiologia Plantarum ◽

10.1111/j.1399-3054.1987.tb04328.x ◽

1987 ◽

Vol 70 (4) ◽

pp. 708-712 ◽

Cited By ~ 13

Author(s):

Raimundo S. Barros ◽

Steven J. Neill

Keyword(s):

Abscisic Acid ◽

Shoot Growth ◽

Water Status ◽

Plant Water Status ◽

Salix Viminalis ◽

Plant Water ◽

Acid Plant

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Infradian rhythms of daily shoot increment in Salix viminalis (salicaceae) clones

Bulletin of Nizhnevartovsk State University ◽

10.36906/2311-4444/21-2/02 ◽

2021 ◽

Vol 54 (2) ◽

pp. 12-22

Author(s):

Alexey A. Afonin

Keyword(s):

Seasonal Dynamics ◽

Harmonic Oscillation ◽

Salix Viminalis ◽

Regression Equations ◽

Daily Growth ◽

Infradian Rhythms ◽

Infradian Biorhythms ◽

One Year ◽

Nonlinear Components ◽

Analysis Of Time Series

Abstract. The structure of seasonal dynamics of daily growth of shoots of basket willow (Salix viminalis) is described and analyzed. Object: model inbred-clone population of S. viminalis. Material: developing shoots on annual saplings from cuttings. Methods: comparative morphological, chronobiological, numerical analysis of time series. The formation of dimorphic root systems of one-year saplings from cuttings is described. It is established that the seasonal dynamics of daily increment of shoots is determined by the interaction of linear and nonlinear components. Linear components are approximated by regression equations, and nonlinear components are approximated by harmonic oscillation equations. The rhythmicity of seasonal dynamics of shoot growth is described. Four groups of biorhythms were identified: annual with a period of about 96 days, subannual with a period of 4064 days, and infradian with a period of 1924 days and infradian with a period of 1016 days. The alternation of peaks and dips in the seasonal dynamics of shoot increment is determined by infradian biorhythms with a period of 19...24 days. Infradian biorhythms with different periods are synchronized with each other. The probable reason is the existence of a pulse synchronizer of biorhythms. Interclonal differences in the seasonal dynamics of the daily growth of shoots were not revealed. The probable cause of intraclonal differences is the ontogenetic heterogeneity of vegetative buds, from which annual shoots have developed. To verify this hypothesis, we plan to observe the development of seedlings grown from cuttings harvested from different parts of the uterine shoots. The results obtained are recommended to be taken into account when planning agroforestry measures for crop of S. viminalis.

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Infradian rhythms of increment dynamics of shoots in clones of almond willow (Salix triandra, Salicaceae)

Agrarian Bulletin of the ◽

10.32417/1997-4868-2021-205-02-2-11 ◽

2021 ◽

Vol 205 (02) ◽

pp. 2-11

Author(s):

Aleksey Afonin

Keyword(s):

Seasonal Dynamics ◽

High Reliability ◽

Growing Season ◽

Control Group ◽

Regression Equations ◽

Daily Growth ◽

Daily Increment ◽

Nonlinear Components ◽

Salix Triandra ◽

And Control

Abstract. Purpose of research – harmonic analysis of the structure of seasonal dynamics of daily increment of shoots in almond willow (Salix triandra) clones. Research methodology and methods. Object is a model population created by cuttings of sibs-seedlings from the same family obtained by regular inbreeding over three generations. Material – growing long shoots. Experimental group: seven clones of one-year saplings from cuttings; 6-fold repetition. Control group – seedlings from the same family on their own roots of the fourth year of life. Methods: comparative morphological, chronobiological, numerical analysis of time series. Observations were made during the growing season of 2020. Results. The beginning of the growth of shoots – the end of the first decade of May. The maximum daily increase is in early summer (06.06…14.06). Further, the daily growth decreased unevenly until the end of August. Seasonal dynamics of daily increment is determined by the interaction of linear and nonlinear components. Linear components determine the seasonal trend of daily increment dynamics. They are approximated by the corresponding regression equations with different reliability. Nonlinear components determine the cyclical nature of the seasonal dynamics of daily increment. They are approximated by sums of harmonics with an oscillation period of 9–144 days with very high reliability. Scientific novelty. The cyclical nature of the seasonal dynamics of daily increment is determined by the interaction of biorhythms with different periods. Subannual biorhythms with a period of more than 48 days correct seasonal trends of daily increment. Infradian biorhythms with a period of 9...36 days determine the alternation of peaks and dips in the seasonal dynamics of daily increment. Biorhythms with a period of 29...36 days were synchronized in the experimental and control groups, but shifted in phase when comparing the experiment and control. Biorhythms with a period of 21...24 days are synchronized on all the researched shoots. Biorhythms with a period of 9…18 days are not synchronized, but their resulting fluctuations affect the dynamics of daily increment at the beginning and end of the growing season.

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Seasonal dynamics and effects of nitrogen supply rate on nitrogen and carbohydrate reserves in cutting-derived Salix viminalis plants

Canadian Journal of Forest Research ◽

10.1139/x98-183 ◽

1999 ◽

Vol 29 (1) ◽

pp. 85-94 ◽

Cited By ~ 41

Author(s):

Lars Bollmark ◽

Lisa Sennerby-Forsse ◽

Tom Ericsson

Keyword(s):

Seasonal Dynamics ◽

Growth Cycle ◽

Salix Viminalis ◽

Soluble Carbohydrates ◽

N Availability ◽

Pioneer Species ◽

Carbohydrate Reserves ◽

N Protein ◽

Perennial Plant ◽

Plant Parts

Nutrient storage is an important aspect of resprouting potential and production of Salix viminalis L., a pioneer species used for biomass production in Sweden. Seasonal dynamics of nitrogen (N), protein, soluble carbohydrates, starch, and lipids were studied in roots, cuttings, stems, and leaves during a full growth cycle induced by varying photoperiod and temperature in a growth chamber. Nitrogen was supplied at two rates. Both season and N availability significantly affected storage of N and carbohydrates. Reserves peaked in dormancy, and plants grown at a higher N availability were able to build up larger N reserves, whereas carbohydrate reserves were similar in the two N treatments. All perennial plant organs functioned as storage sites for N. Roots were prominent in carbohydrate storage, in good agreement with the notion of a pioneer species adapted to recurring disturbance by a pronounced resprouting capacity. Roots differed from aboveground plant parts in their exceptionally high starch levels, and in that N storage in roots to a greater extent involved nonprotein compounds. Triglycerides contributed to carbon storage in aerial plant parts but not in roots. Our results suggest that an increased N supply enhance both the accumulation of nutrient reserves and early season growth.

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