Yield of Early Maturing Sunflower Varieties, Different-Aged Crops as a Secondary Crop in the Zarafshan and Surkhandarya Oases of Uzbekistan
DOI:
https://doi.org/10.47494/mesb.2021.19.965Keywords:
Surkhan oasis, Zarafshan oasis, sunflower, entomophilic plant, repeat crop, sowing period, growing season, oilAbstract
In Uzbekistan, oilseed sunflowers are grown mainly as a secondary crop on fertile land free from cereals.
Every summer, 1.1-1.3 million hectares of irrigated land in the country are cleared of cereals. Due to the hot climate in the southern oasis (Surkhandarya region), grain is harvested in the first 10 days of June, and in the Zarafshan oasis (Samarkand region) in the third 10 days of June, winter wheat is harvested.. Due to the different weather conditions in Surkhandarya and Samarkand regions, the sowing period of sunflower as a secondary crop differs significantly. Yields will also vary. Yields of early maturing sunflower SAI 20-80 and Dilbar varieties planted between June 20, June 30, July 10 and July 20 were analyzed as a repeat crop to determine the optimal planting time of sunflowers in both oasis soil climatic conditions.
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