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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 69, No. 2, 2009, pp. 244-251
Bioline Code: cj09028
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 69, No. 2, 2009, pp. 244-251

 en Phosphate fertilization can increase yield of productive grass pea ( Lathyrus sativus check for this species in other resources l.) crops in p-retentive soils
Montenegro, Adolfo A. & Mera, Mario M.


The effect of P fertilization on grass pea ( Lathyrus sativus check for this species in other resources L.) yield and yield components was evaluated on soils with low P availability and high P retention capacity in small-scale farms of the Araucanía Region in southern Chile. Trials were conducted during 2000-2001, 2001-2002, and 2002-2003, in six sites; three sites in Lumaco and three in the Selva Oscura area. Six rates of P (0, 21.8, 43.6, 65.4, 87.2, and 109.0 kg ha -1 ) were evaluated in a randomized complete block design with four replicates. Grass pea cv. Luanco-INIA was sown at 47 seeds m -2 . Mean grain yield for all trials was 2456 kg ha -1 . Phosphate fertilization increased grass pea grain yield in both areas during 2000 and 2001. There was no significant effect in 2002. The 2002 cropping season had an unusually high spring-summer rainfall, which may have enhanced the P mineralization rate from organic soil fraction, and thus P availability. According to this study, grass pea crops in soils with < 10 mg kg -1 of available P-Olsen should respond to P fertilization.

grass pea, Lathyrus, phosphorus, neglected crops, cool-season legumes.

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