Seed Quality Properties of Grass Pea (Lathyrus sativus L.) in Response to

Document Type : Research Article

Authors

• I Niromand Tomaj
• M Jami Al-Ahmadi
• A Riasi
• Gh Zamani

10.22067/gsc.v9i4.13263

Abstract

In order to evaluate effects of plant density and planting date on quality properties of grass pea (Lathyrus
sativus L.), a factorial experiment was conducted during 2008, based on complete randomized block design with
four replications in Research Farm of Faculty of Agriculture, the University of Birjand, Birjand, Iran. Plants
were planted at March 5 and 20, and Apr 3, with 30, 40, 50 and 60 pl m-2. Delaying in planting and/or increasing
plant density caused protein content per grain dry matter to be reduced. There was a negative correlation
between grain protein percentage and grain ash content. The highest grain ash percentage (4.3%) was observed
in the last planting date. Tannin content reduced significantly with delaying in planting date, from 0.32% in
March 5 to 0.14% in Apr 3planting dates, and showed a negative correlation with ash content. Seed energy
content also was reduced with delaying in planting date and/or increasing in density, and showed a positive
correlation with seed protein percentage. It seems early planting of grass pea with a density of 40-50 pl m-2
results in a high quality seed yield.

Keywords

• Ash
• Oil
• Protein
• Seed Energy Content
• Tannin

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