Effect of nutrient seed coating on the emergence and early growth of perennial ryegrass

Abstract

Perennial ryegrass (Lolium perenne L.) seeds were coated with either lime, reverted superphosphate plus nitrogen as isobutylidene diurea (RSN), or partially acidulated rock phosphate plus sulfur (ESPARP). In one experiment emergence rates and total emergence were calculated by fitting Mitscherlich-type curves to the data and then conducting statistical tests on the three parameters found for each curve. There was a significant interaction between soil moisture and coating treatment for all three parameters. In a glasshouse experiment, the same coated and uncoated seed treatments were sown either in soil supplied with nitrogen, phosphorus and sulfur or in soil with nutrient deficiencies of either N, P, or S or NPS, and the early growth of the plants and their P and N uptakes were studied. The two nutrient-coated treatments (RSN and ESPARP) produced more tillers and dry matter yields of roots and shoots than did lime-coated or uncoated seed when grown in soils deficient in P, S or NPS. Nitrogen deficiency reduced yields of all plants, even those derived from RSN seeds. N uptake in the RSN treatment was not significantly different from the ESPARP treatment, indicating that the N in isobutylidene diurea was not available to the plant.

Vigor and Viability of Harvested Barley Seeds as Affectd by Phosphorus Levels and Nitrogen Fixing Bacteria

“…The germination rate (6.17) was higher under beneficial microbes' conditions as compared to without beneficial microbes' conditions (5.85). The results are supported by Scott et al (1985) who reported that the early vigor of barley seedlings was ensured by promotion of the formation of photosynthetic pigments and accordingly, higher rates of photosynthesis. The results are supported by Bákonyi et al (2013) The possible mechanism of PGPB on the germination process is that these useful bacteria can excrete phytohormones such as auxins and gibberellins, etc., thereby improving seed germination and early development.…”

Effect of seed phosphorus and soil phosphorus applications on early growth of rice (Oryza sativaL.) cv. IR66

“…Seed coating has been studied by many researchers (Ascher et al 1994: in wheat;Si1cock and Smith 1982;Scott et al 1985;Scott and Blair 1988: in pasture species). Increase of P concentration in rice seed by coating seed with fertilizer or soaking it in nutrient solution, has the potential to increase the efficiency of the use of limited amounts of fertilizer.…”