RU1839071C - Method for determining parameters of thermal presowing action on seed potato tubers - Google Patents

Description

The invention relates to agriculture and can be used for the production of seed potatoes,

The purpose of the invention is to increase the accuracy of determination and optimization of exposure parameters,

The method is carried out as follows.

From the batch of tubers stored at low temperatures (1-5 ° C), four experimental groups of 50 tubers of the same size and visually healthy were selected. The electrical resistance is measured with needle electrodes in the upper part of the tubers at low (1-100 KHz) - V and high (1-100 MHz) Raepxn. 1 frequencies (at one of the frequencies of the indicated ranges) and at the bottom (.1) at one from frequencies in the range from 1 to 100 MHz (high) and calculate

A

Then groups of tubers

.I

placed in different temperature regimes for 3 days, after which they measure the electrical resistance of each tuber of the experimental groups in the same order and calculate C (resistance in the upper part of the tubers) at a low frequency and B

upper 2 (ratio of resistances to high lower 2

the temperature range) .- The optimal temperature regimes are those for which B / A 1.

Determination of the optimal parameters of temperature effects must be carried out in the following order.

1. Determination of optimal modes of temperature effects (A and B).

2. Determination of the duration of exposure to optimal modes (B and C).

Example 1 illustrates the determination of optimal temperature conditions.

Tuber groups c. Domodedovo (early), for which A is calculated, is placed in various temperature conditions - 6-10 ° C,, 24-30 ° C, 34-40 ° C for 3 days, after which B. is calculated. The electrical resistance is measured at a frequency of 1 MHz, The data for calculating the determination of the optimal regimes of temperature effects are given in table. 1.

The determination of the optimality of the temperature exposure mode is due to the fact that the ratio of the electrical resistance presented in the form of transient characteristics A and B. measured in the upper and lower parts of the club, to, from 1 to 100 MHz.

0

5

0

5

0

correlates with the number of sprouts of non-tuber x, the dominance of the apex and the distribution of starch within the tuber. Temperature conditions in which the ratio of the characteristics of the transition processes B / A 1 are characterized by a slow restoration of the dominance of the tuber apex and a slight change in the distribution of starch within the tuber.

Such a determination of the optimality of temperature conditions takes into account varietal differences in the number of developing sprouts, contributes to their uniform distribution and development within the tubers. As can be seen from the table. 1, at 14-20 ° C B / A 1, and therefore this temperature mode is not optimal.

Example 2 illustrates the determination of the duration of exposure to optimal conditions. Groups of tubers from Domodedovo village (early), for which B was calculated, are placed in various temperature conditions - 6-10 ° C. 24-30 ° C, 34-40 ° C for 3 days. after which C is calculated. The electrical resistance is measured at a frequency of 10 MHz. The data for calculating the determination of the duration of exposure to optimal temperature conditions are given in table. 2.

In the proposed assessment of the duration of exposure to optimal temperatures

0 - t ° - the sum of positive

R -

T

op

Where

5

0

5

0

5

the temperature necessary for an effective and sufficient pre-landing exposure to temperature is 600 ° C for the Domodedovo village; Т0п is the average temperature of the optimal temperature regime defined in Example 1, with which it should be calculated in form C

le R / -N- time period to bring to tubers

in the process of pre-planting, a known sum of positive temperatures.

Estimation of the exposure duration by optimal temperature regimes allows one to calculate such a duration that takes into account the current state of tubers (up to 3 days), i.e. the degree of exit from the resting period, and set the exposure duration sufficient and necessary in the optimum temperature regime for the uniform development of the desired number of sprouts. Such germination is possible only for C / B 1, because at C / B 1, this process is inhibited.

The optimal calculation of the duration and temperature regime for pre-immediate effects on seed credit to

a greater number of stems on the plant, their uniform growth and simultaneous tuberous maturation.

(56) Goodwin P. Mechanism and significance of the dominance of the top of potato tubers. In: Growth and development of potatoes. Translation from English ON THE. Emel new, M .: Science. 1966, p. 87-97.

Assessment of the optimality of the temperature exposure mode

Estimation of exposure duration by optimal temperature regimes

Claims (1)

The claims THE METHOD FOR DETERMINING THE PREPARED TEMPERATURE INFLUENCE PARAMETERS ON SEED POTATO FISHERIES, including measuring the characteristics of tubers, is characterized in that, in order to increase the accuracy of determining and optimizing the exposure parameters, seed tubers are placed in different temperature modes for three days. They have electrical resistance in the frequency range 1 - 1C 0 MHz in the upper (Up) and lower (R (Izhn) parts of each tuber, calculated table 2 ratios A R top1 0 RHHJKHt responsible before and after and B R upper CO nizhn 2 three day temperature exposure and optimal conditions include temperature conditions for which B / A 1, the duration of exposure to optimal temperature conditions is determined from the ratio . 600-V, where Top is average temperature I OP 40 optimal temperature regime. L - length | impact duration, day; B, C - resistance, measured in the upper part; tubers in the frequency range 1 - 100 MHz, before and after three-day exposure to | responsibly, provided that C / B 1.