EFFECT OF IRRIGATION REGIME AND TIMING/RATES OF RETARDANT APPLICATION (BASED ON PLANT DENSITY) ON COTTON WEIGHT PER BOLL IN THE IMPORTED XINLUZHONG-52 VARIETY
DOI:
https://doi.org/10.47390/ydif-y2026v2i13/n06Keywords:
cotton, irrigation regime, minimum water-holding capacity (MWHC), theoretical plant density, plant growth retardant, mass of raw cotton per boll, cotton yield.Abstract
In this study, foreign cotton varieties were cultivated under two regimes: the first involved maintaining soil moisture prior to irrigation at 70–75–65% of field capacity (FC), a theoretical plant density of 220,000–240,000 plants/ha, and six applications of plant growth retardants during the growing season; the second involved moisture levels of 65–70–60% FC, a density of 150,000–160,000 plants/ha, and three applications of retardants. Compared to the respective control variants, the weight of cotton per boll was 0.3–1.2 g higher, and the yield increase ranged from 9.8 to 28.0 centners/ha.
References
1. Isaev R., Rashidova D., Mamedov N. Ko’chat soning urug’lik paxta hosili, ko’sak yirikligi va chigit vazniga ta’siri. // O’zbekiston qishloq xo’jaligi jurnali. 2009. №4. B. 9-10.
2. Jumaboyev Z., O’razmatov N.N.- Takroriy dukkakli don ekinlar hosildorligi. Xalqaro ilmiy amal. konferentsiya materiallari to’plami. -Toshkent. 2018. B. 337-339.
3. Karabaev I.T. - Takroriy ekin ekish oldidan yerga ishlov berish // O’zbekiston qishloq xo’jaligi. 2014. -№5. –B. 27-29.
4. Bekker M.M., Govers G., Jones R.A., Rounsevell M.D.A The effect of soil erosion on Europe’s crop yields, Ecosystems. 2007. 10. rr. 1209-1219
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