Influence of numbers and spraying site of humic acid on growth and yield of potato (Solanum Tuberosom L.) cultivated by true potato seed

	Influence of numbers and spraying site of humic acid on growth and yield of potato (Solanum Tuberosom L.) cultivated by true potato seed
journal of kerbala university
Article 1, Volume 7, Issue 3, 2011, Pages 61-67 PDF (0 K)
Abstract
An experiment was conducted in the greenhouse to study the effect of spraying numbers and spraying site of Humic acid on individual potato seedlings (aged 30 days from planting true potato seeds). The experiment carried out in accordance with Complete Random Design included two factors: the first three levels of spray (0 , 2, 4 times ) and the second: three sites for spraying: vegetative, soil, foliage + soil. Pots filled with 10 kg of planting mixture (2/3 river soil 1/3 peat- mouse), planted with one seedling in each pot, using four pots for each replicate. The results can be summarized as follow: Spraying humic acid led to increase in plant height and number of leaves per plant as compared with control, also the treatment four times spraying was superior upon two times of spraying. The site of the spray on foliage soil around roots caused a significant increase in plant height and number of leaves per plant as compared with spraying foliage only. Humic acid spraying led to increase tubers number per plant, total yield of tubers and total weight and numbers of tuber/plant with the largest weight of 20 g significantly as compared with control. 4 times spray led to increase plant yield of tubers with the largest weight of 20 g as compared with two time sprays. Spraying foliage soil around the roots was superior upon foliage spray or sprays the soil only. The interaction had a significant effect, and the treatment of four times sprayed on foliage soil around roots was superior in most traits.

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