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Evaluation of the intensity of new crop varieties and hybrids by the key factors

Author(s) Kharchenko O.V., Doctor of Agricultural Sciences, ,
Petrenko C.V., , ,
Prasol V.I., Candidate of Agricultural Sciences, ,
Sobko M.H., Candidate of Agricultural Sciences, ,
Medvid S. I., , ,
Category The Agronomy
year 2019 issue Issue number 95. Part 1
pages 166-177 index UDK 631.527:633.85
DOI 10.31395/2415-8240-2019-95-1-166-177 (Link)
Abstract This article focuses on the issue of quantitative evaluation of the efficiency of using the key factors (moisture and mineral nutrition) in relation to a new crop hybrid or variety. The field studies were carried out on the substations of the Institute of Agriculture of the North East of the NAAS for 3 years (2016-2018). The studies were conducted with the use of DS0493B hybrid. The experiment replication is threefold. The area of a registration plot is 28 m2. The yield was taken into account at humidity of 14%. The seeding rate was 89 thousand pieces/ha. The fertilizers applied were N100Р45К45. The level of the hybrid intensity through the ratio of actual yield (Ya) and its specified value both by the resource of moisture (Ysv) and the resource of mineral nutrition (Ymn) was taken as an integrated index of resource efficiency. It was found that in dry conditions (2017 and 2018) the intensity level by moisture resources was amounted to 3.58-2.75, and by mineral nutrition resources was equal to 1.70-1.29, indicating the limiting role of moisture under the above conditions. The actual values of the total evapotranspiration ratio were amounted to 2.38 and 3.087 mm/c with the specified value amounting to 8.50 mm/c, and the actual payback was equal to 12.7 c/c and 9.7 c/c with the specified value amounting to 7.4 c/c. Under the conditions of sufficient moisture (2016), the limiting factor was the nutrition resource. The value of the hybrid intensity by the resource of this factor was 1.84, and the maximum payback of fertilizers was amounted to 13.8 c/c. It was found that on average during the three years of studies by the level of moisture, these conditions were characterized as close to average. It was proven that under these conditions the limiting factor was moisture, the hybrid intensity by moisture was 2.49, and by mineral nutrition -1.61 with the total evapotranspiration ratio of 3.24 mm/ha, and the payback of fertilizers was amounted to 12.1 c/ha. Thus, the studied data obtained related to DS0493B hybrid may be considered as normal data.
Key words hybrid intensity level, total evapotranspiration ratio, limiting factor, standard yield capacity, payback of fertilizers
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