Effect of Nitrogen Top Dressing at Late Flowering Stage on Yield and Chemical Components in Perilla

Abstract

Perilla is an excellent oil crop for linolenic acid production but still needs more research to improve grain yield and chemical properties. We tried to estimate the possibility for improving grain yield and its quality by applying nitrogen top dressing(4kg per 10a) at 5 days after flowering stage of perilla, using a cultivar Yujin. This study investigated the growth characteristics and seed quality. Nitrogen top dressing on the flowering stage has little affected on such traits as length, node number and diameter of main stem, and branch, cluster and capsules numbers per plant. But compared with standard cultivation as a control, top dressing showed more leaf chlorophyll content by 85%, higher 1000-grain-weight by 31%, and one day extension of maturing period; consequently, grain outyielded by 60% with 123kg per 10a. Seed chemical components also showed 33.3% protein and 48% oil contents that were 11.5% and 6.2% higher than those of control, respectively. Also by top dressing, saturated fatty acid (palmitic and stearic acid) decreased and linoleic acid among unsaturated fatty acids increased. It is concluded that nitrogen topdressing at late flowering stage promotes grain yield and quality of perilla.

Growth and yield parameters of Pea (Pisum sativum L.) as influenced by different priming treatments

“…In many plant species, including the garden pea, the function of GA3 is that of regulating and stimulating the activities of sub-apical meristems and inducing flowering. Similar findings were presented by Lee (1990) [8] in groundnut.…”

“…It might be because GA3 induced more branches, which provided better chances of flower bud development. Similar reports were presented by Lee (1990) [8] in groundnut.…”

“…This might be explained by the fact that priming with GA3 resulted in more flowers per plant, and subsequently more pods. Similar findings were reported by Mazed et al, (2015) [10] in chickpea, Lee (1990) [8] in groundnut and Pushpalatha (2008) [12] in bhendi.…”

Response of plant growth regulators on growth and yield of groundnut (Arachis hypogaea L.)

“…The significant increase of seed yield under the various plant growth regulator appear to be due to their significant impact on the number of pods/plants, test weight and increase in growth parameters. These findings are in line with Sarkar et al, (2002) [10] and Sudadi (2012) [11] in soyabean and Lee (1990) [7] in groundnut.…”

“…Plant growth regulators can be successfully working to enhance the yield in the economically important oil seed crops Rastogi et al, (2013) [9] . IAA has been found to increase the plant height, number of leaves per plant, pod size with consequent enhancement of Karnel yield in groundnut Lee (1990) [7] .…”