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Growth analysis, forage yield and quality of four Grass pea (Lathyrus sativus L.) ecotypes as affected by plant density and planting method in double cropping system
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Abstract: (4455 Views) |
| In order to study the effect of plant density and planting method on forage yield and quality of four grass pea (Lathyrus sativus L.) ecotypes, a field experiment was carried out during 2005 summer season in Hidaj town (Zanjan province, Iran). Treatments were arranged in a factorial experiment using Randomized Complete Blocks Design with four replications. Grass pea seeds of Zanjan, Ardabil, Shahre-e-Kord and Mashhad ecotypes (E1-E4) were sown in two planting methods (flat plots and furrowed plots) (P1 and P2) at two plant densities (110,000 and 220,000 p.ha-1) (D1 and D2) on July 28, 2005. The former crop was wheat. Seven destructive samples were taken during grass pea growing season to study the trend of CGR and RGR. Different quantitative traits (plant height, forage fresh and dry yield) and quality traits [DM(%), crude protein(%), Ca(%), P(%) and NDF(%)] of forage were measured. Result showed that grass pea grown in flat plots had higher CGR and RGR. Also fresh and dry forage yield in flat plots with 220000 p.ha-1 were significantly more than furrowed plots with 110/000 p.ha-1. Mashhad ecotype by producing 29.4 t.ha-1 fresh forage yield and 5.98 t.ha-1 dry forage yield was the best forage producer among all ecotypes. However, there was no significant difference between Mashhad, Zanjan and Shahre-e-Kord ecotypes. The Ardabil ecotype produced the lowest forage yield as 21.7 t.ha-1 and 2.66 t.ha-1 for fresh and dry weight, respectively. Plant height in dense plots (220000 p.ha-1) was significantly higher than 110,000 p.ha-1. Crude protein percent was significantly affected by all factors. Main effects of planting method and plant density were significant for Ca% and NDF%. Phosphorus percent has not affected by any of experimental factors. The Ardabil, Zanjan and Shahre-e-Kord ecotypes were superior for CP%, NDF% and Ca%, respectively. It can be concluded that P1D2E4 system (Mashhad ecotype sown in flat plots with 220000 p.ha-1) was superior. |
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| Keywords: Grass pea (Lathyrus sativus L.), Plant density, Forage yield, Planting pattern, Double cropping system |
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Full-Text [PDF 3982 kb]
(1270 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2015/02/25 | Accepted: 2015/02/25 | Published: 2015/02/25
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