Oxidative Stress Effects on Potato Yield and its Compound Elements
Keywords:
potato, variety, yield, tuber number, tuber weightAbstract
Potato is the major crop in Mongolia after ranking wheat. Planting area covers between 12 and 14 thousand ha with 170-190 thousand tones total yields. It’s new challenge for developing new potato variety with tolerant to environmental stresses. Many modern varieties of potatoes are considered to be drought-sensitive. Potato growing in the agro-ecology environment of the country is believed as little risky for dry farming, but weather change during the last years’ requests to be reassessed the circumstances. Especially, the coincidence of hot weather frequency and rainfall shortage in July with potato tuber bulking causes the downed harvest. The field experiment was carried out at IPAS in 2018. The trial was conducted to identify oxidative stress effects on potato yield. There were studied 4 cultivars for yield and its compound elements. During the vegetation period were sprayed Gramoxone (Paraquat) with dosage of 0.3 l/ha for purpose of affect plants through oxidative stress at the 3 different development and growth stages including: budding, flowering and tuber bulking. The analysis of variance (ANOVA) was carried out using SPSS computer software version 16.0 with Tukey test.
Stress effect on potato growth stages was decreased yield differed as in budding 45 %; in flowering 18.2 % and tuber bulking 10.2 %. The analysis of variance revealed the total yield was significant (P<0.05) due to main effect of both variety and oxidative stress treatment. The control treatment was recorded significantly higher yield compared with other treatments among varieties. Cultivar Vineta and Bellarose were gave higher tuber yield significantly from other varieties. Potato tuber yield is higher correlated with number of tuber per plant, tuber weight, and number of marketable tuber. The highest potato yield (526 g) obtained at control treatment with cv. Vineta.
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2. http://www.panna.org/sites/default/files/Paraquat%20monograph%20final%202011-1.pdf
3. http://www.syngenta.com/global/corporate/en/products-and-innovation/product-brands/crop-protection/herbicides/Pages/gramoxone.aspx
4. http://cdn.intechopen.com/pdfs-wm/25618.pdf
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