Factors affecting seed and seedling vigour

Factors affecting seminal fluid and seedling vigour Seed vigour is a term encompass the sum total of those properties of the seed that even up the potential death penalty of the seed or seed lot during spr revealing and seedling issue (Perry, 1978). Rapid and uniform germination atomic number 18 among the properties of vigorous seeds (Argerish & axerophthol; Bradford, 1989). starting time vigour adversely affects such factors as best emergence, nidus resistance and uniform growth of emergent seedlings (Patrick et al, 2000) and is thusly of cracking economic importance. Seeds, which grow fountainhead under the rarefied conditions of the germination test, often do not coiffure so well when planted under the more stressful conditions of the field. nearly seedlots perform particularly badly under stress, and are utter to be of emit vigour. A considerable amount of enquiry has been carried out to discover the causes of offset vigour, since if it could be prevented, fewer low-vigour seedlots would fill to be wasted (pers.comm. Dr. A. Goldsworthy, 2003). Unfortunately, there does not seems to be a atomic number 53 underlying cause. Seeds which are either handsomeer or large than normal, are often of low vigour. Sawan et al (1999) appoint that twain seed size and seed density are correlate with seedling vigour in cotton. Small seeds may wish provender reserves, and large seeds may be more well alter by harvesting or dedicate metabolous abnormality. These ass be removed from an otherwise healthy seedlot by seiving. The seedling characteristics virtually closely associated with lower seedling vigour are a small embryo, small primary leaves on the main shoot, a low leaf area to leaf weight ratio, and a low frequency of coleoptile tillers (Richards & Lukacs, 2002). Sometimes low vigour seeds start out a low protein content. This may be due to superficial nitrogen fertilisation. Application of more nitrogen will doctor this problem... ! If you want to get a full essay, order it on our website: OrderCustomPaper.com

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