ISSN 1607-2774
Семей қаласының Шәкәрім атындағы мемлекеттік университетінің хабаршысы № 4(92)2020
274
grass for green food at the beginning of broom sweeping [9, 10]. Some researchers are inclined to
recommend harvesting Sudanese grass for green food in the phase of complete tubulation [2]. The
nature of the growth of Sudanese grass is greatly influenced by the height of the cut of plants
during harvesting. Most researchers recommend mowing at a height of 6-8 cm [3, 4].
The aim of the research is to study the dependence of the yield of Sudanese grass on the
height of the cut of grass stands.
To achieve this goal, a field experiment was conducted in 2018-2020 at the experimental
field of the Zhangir Khan wkatu the project: "Development of adaptive technologies of forage and
oil-bearing crops cultivation in relation to the conditions of West Kazakhstan".
The objects of research are single-species crops of Sudanese grass.
Calculation of plants standing density on shoots and before harvesting allows to determine
the influence of the studied factor on conditions of shoots and loss of plants during vegetation.
Study of growth dynamics allows to define the period of the most intensive growth.
Photosynthetic activity of cultures is studied by the standard technique [5]. Photosynthetic
activity characterize productional processes of crops. The determination of the main photosynthetic
parameters in the phases of crop development.
One leaf area was calculated by Anikeeva-Kutuzov folmula: LA= 2/3p*h, where p - width of
leaf, cm; h-length of leaf, cm.
It is possible to determine influence of term and height of main hay crop on harvest of
aftermath and general efficiency of culture by carrying out observation of recovery ability of Sudan
grass.
Besides special researches for correct explanation of results of field experiments, regular
visual observations of condition of crops in the same hours are made.
Determination of their botanical structure is carried out for the determination of qualitative
composition of herbages.
The analysis of harvest structure allows to study influence of conditions of cultivation and
methods of agrotechnology on features of harvest forage formation and oil-bearing crops, serves
as indirect assessment of production quality.
Harvesting and accounting of harvest is carried out by continuous method.
Laboratory methods:
Chemical composition and nutritiousness of vegetable mass of forage crops and silage
mass of sunflower by standard techniques:
general nitrogen and crude protein point 3 State Standard 13496.4-93;
crude cellulose by State Standard 13496.2-91;
crude fat according by State Standard 13496.15-97;
crude ashes by weight method by State Standard 26226-95;
nitrogen-free extract by subtraction from 100% of the contents of crude cellulose, crude
ashes, crude fat and crude protein; phosphorus by photometric method according to State
Standard 26657-97;
potassium by ardent and photometric method after wet combustion of State Standard
30504-97;
calcium by titrimetric method by State Standard 26570-95;
content of solid in green material by drying of hinge plate in a drying cabinet at the
temperature of 105
0
C to constant weight.
Methods of assessment of researches results:
Determination of economic efficiency adaptive technologies of forage and oil-bearing crops
cultivation is carried out by calculation standard method based on flow charts.
Determination of productivity, quality of production and economic, biopower assessment will
allow to determine efficiency of adaptive technologies of forage and oil-bearing crops cultivation.
Biopower assessment of the studied methods is carried out according to the methodical
recommendations [6].
Now, one of the most widespread and perfect methods of statistical data processing of
productivity in field experiments is dispersive analysis. In researches, statistical processing of
researches results by the method of dispersive analysis is carried out with the use of computer
programs [7].
Достарыңызбен бөлісу: