The study of multivariance in realization of the plum graft and rootstock combinations adaptivity systems to the changing conditions of environment in the Krasnodar region with the use of digital technologies

Open Access

Table 1

The critical minimum temperatures of air for the flower buds of Stanley and Kabardinskaya Ranniaya plum varieties grafted by cherry plum and PK SK 1 at the stages of winter and spring period (averaged reading for the south of Russia).

Stages of winter and spring period		Cherry plum graft		PK SK 1 graft
Stages of winter and spring period		Stanley	Kabardinskay a Ranniaya	Stanley	Kabardinskay a Ranniaya
Biological rest	Decades	January I, II, III	January I, II, III	January I, II, III	January I, II, III
	Abs. Min	<-32	<-26	<-34	<-28
	Decades	February I	February I	February I	February I
	Abs. Min	<-28	<-24	<-30	<-25
Exogenous dormancy	Decades	February II, III	February II, III	February II, III	February II, III
Exogenous dormancy	Abs. Min	<-28	<-22	<-26	<-20
Swelling of flower buds	Decades	March I	March I	March I	March I
	Abs. Min	<-18	<-15	<-20	<-15
	Decades	March II	March II	March II	March II
	Abs. Min	<-16	<-12	<-17	<-12
Bud dehisced, sepals are visible	Decades	March III	March III	March III	March III
	Abs. Min	<-13	<-10	<-13	<-10
	Decades	April I	April I	April I	April I
	Abs. Min	<-10	<-8	<-10	<-8
Start of flowering	Decades	April I	April I	April I	April I
Start of flowering	Abs. Min	<-2	<-1	<-3	<-2

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