| Autor: |
Matev, Alexander, Stamatov, Stanislav, Uzundzhalieva, Katya, Petrovska, Natalya, Masheva, Veselina, Andonov, Blagoy |
| Předmět: |
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| Zdroj: |
Romanian Agricultural Research; 2024, Issue 41, p271-277, 7p |
| Abstrakt: |
The aim of the current study is to investigate the influence of reduced irrigation rates on the maize grain yield (group 600 - FAO), grown in Plovdiv region as well as to establish the parameters of the correlation "Additional yield - irrigation rate". The experiment was conducted during the period 2004-2018 in the Agricultural University with the late hybrid "Knezha - 613". The next variants were studied: without irrigation (1); irrigation with 25%, 50% and 75% from the optimal irrigation rate (2, 3, 4) and optimal irrigation rate (5). The results show that reduction of the irrigation rate with 25% reduces the yield with 1-17%. The reduction of the yield is bigger in 50% reduction of the irrigation rate, the difference compared to the optimal irrigation being of 3-33%. The correlation "Additional yield - irrigation rate" can be expressed by the regression equation Y=1.33x-0.28x2 or by the power formula Y=1-(1-x)1.35. In both cases the accuracy is the same (R=0.92), but the power formula gives more freedom for expression of that connection and so it is recommended. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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