The flowering biology of physic nut (Jatropha curcas L.) has been observed in dry land (sandy entisol soil type) of Amor-Amor, North Lombok, West Nusa Tenggara. Exploration was conducted in several areas where high population of physic nut grown as fence plant was found. Quantitative, descriptive, and observation data were collected for each accession during two-year growth period. Randomized block design was used in this research with three replications from November 2006 until November 2008. Treatments consisted of five ecotypes, i.e. West Lombok, Central Lombok, East Lombok, Sumbawa, and Bima. The results showed that flowering of physic nut West Nusa Tenggara ecotypes was produced continuously during a year, while the peak number of flower was only twice e.g. at the early (November-February) and at the end (April–May) of rainy season. Duration of the flowering process took around 3 days for female flower, around 2 days for male flower, and 7-10 days for total flower per inflorescence. Higher genetic potential for female flower formation was found on West Lombok, Sumbawa, and Bima ecotype. This result should be useful information for breeding programme of physic nut. However, since physic nut is a perennial plant, further study is needed especially on the technology to control flowering. Keywords: dry season, flowering, fruiting, rainy season,

Main Author:	Santoso, Bambang Budi; 1 Jurusan Budidaya Pertanian, Fakultas Pertanian, Universitas Mataram Jl. Majapahit No. 62 Mataram-NTB, Indonesia
Other Authors:	The flowering biology of physic nut, ">Jatropha, ">curcas L.) has been observed in dry land (sandy entisol soil type) of Amor-Amor, North Lombok, West Nusa Tenggara. Exploration was conducted in several areas where high population of physic nut grown as fence plant was found. Quantitative, descriptive, and observation data were collected for each accession during two-year growth period. Randomized block design was used in this research with three replications from November 2006 until November 2008. Treatments consisted of five ecotypes, i.e. West Lombok, Central Lombok, East Lombok, Sumbawa, and Bima. The results showed that flowering of physic nut West Nusa Tenggara ecotypes was produced continuously during a year, while the peak number of flower was only twice e.g. at the early (November-February) and at the end (April–May) of rainy season. Duration of the flowering process took around 3 days for female flower, around 2 days for male flower, and 7-10 days for total flower per inflorescence. Higher genetic potential for female flower formation was found on West Lombok, Sumbawa, and Bima ecotype. This result should be useful information for breeding programme of physic nut. However, since physic nut is a perennial plant, further study is needed especially on the technology to control flowering. , ">Keywords: dry season, flowering, fruiting, rainy season, ">
Format:	Article info application/pdf eJournal
Bahasa:	eng
Terbitan:	Bogor Agricultural University
Online Access:	http://journal.ipb.ac.id/index.php/jurnalagronomi/article/view/%20%3Cp%20class%3D%22BODYTEXT%22%3E%3Cem%3EThe%20flowering%20biology%20of%20physic%20nut%20%28%3Cspan%20style%3D%22text-decoration%3Aunderline%3B%22%3EJatropha%3C%2Fspan%3E%20%3Cspan%20style%3D%22text-decoration%3Aunderline%3B%22%3Ecurcas%3C%2Fspan%3E%20L.%29%20has%20been%20observed%20in%20dry%20land%20%28sandy%20entisol%20soil%20type%29%20of%20Amor-Amor%2C%20North%20Lombok%2C%20West%20Nusa%20Tenggara.%20Exploration%20was%20conducted%20in%20several%20areas%20where%20high%20population%20of%20physic%20nut%20grown%20as%20fence%20plant%20was%20found.%20Quantitative%2C%20descriptive%2C%20and%20observation%20data%20were%20collected%20for%20each%20accession%20during%20two-year%20growth%20period.%20Randomized%20block%20design%20was%20used%20in%20this%20research%20with%20three%20replications%20from%20November%202006%20until%20November%202008.%20Treatments%20consisted%20of%20five%20ecotypes%2C%20i.e.%20West%20Lombok%2C%20Central%20Lombok%2C%20East%20Lombok%2C%20Sumbawa%2C%20and%20Bima.%20The%20results%20showed%20that%20flowering%20of%20physic%20nut%20West%20Nusa%20Tenggara%20ecotypes%20was%20produced%20continuously%20during%20a%20year%2C%20while%20the%20peak%20number%20of%20flower%20was%20only%20twice%20e.g.%20at%20the%20early%20%28November-February%29%20and%20at%20the%20end%20%28April%E2%80%93May%29%20of%20rainy%20season.%20Duration%20of%20the%20flowering%20process%20took%20around%203%20days%20for%20female%20flower%2C%20around%202%20days%20for%20male%20flower%2C%20and%207-10%20days%20for%20total%20flower%20per%20inflorescence.%20Higher%20genetic%20potential%20for%20female%20flower%20formation%20was%20found%20on%20West%20Lombok%2C%20Sumbawa%2C%20and%20Bima%20ecotype.%20This%20result%20should%20be%20useful%20information%20for%20breeding%20programme%20of%20physic%20nut.%20However%2C%20since%20physic%20nut%20is%20a%20perennial%20plant%2C%20further%20study%20is%20needed%20especially%20on%20the%20technology%20to%20control%20flowering.%20%3C%2Fem%3E%3C%2Fp%3E%20%3Cp%20class%3D%22BODYTEXT%22%3E%3Cem%3E%C2%A0%3C%2Fem%3E%3C%2Fp%3E%20%3Cp%20class%3D%22BODYTEXT%22%20style%3D%22text-indent%3A0in%3B%22%3E%3Cem%3EKeywords%3A%20dry%20season%2C%20flowering%2C%20fruiting%2C%20rainy%20season%2C%20%3C%2Fem%3E%3C%2Fp%3E%20%3Cp%20class%3D%22BODYTEXT%22%20style%3D%22text-indent%3A0in%3B%22%3E%3Cem%3E%C2%A0%3C%2Fem%3E%3C%2Fp%3E http://journal.ipb.ac.id/index.php/jurnalagronomi/article/view/%20%3Cp%20class%3D%22BODYTEXT%22%3E%3Cem%3EThe%20flowering%20biology%20of%20physic%20nut%20%28%3Cspan%20style%3D%22text-decoration%3Aunderline%3B%22%3EJatropha%3C%2Fspan%3E%20%3Cspan%20style%3D%22text-decoration%3Aunderline%3B%22%3Ecurcas%3C%2Fspan%3E%20L.%29%20has%20been%20observed%20in%20dry%20land%20%28sandy%20entisol%20soil%20type%29%20of%20Amor-Amor%2C%20North%20Lombok%2C%20West%20Nusa%20Tenggara.%20Exploration%20was%20conducted%20in%20several%20areas%20where%20high%20population%20of%20physic%20nut%20grown%20as%20fence%20plant%20was%20found.%20Quantitative%2C%20descriptive%2C%20and%20observation%20data%20were%20collected%20for%20each%20accession%20during%20two-year%20growth%20period.%20Randomized%20block%20design%20was%20used%20in%20this%20research%20with%20three%20replications%20from%20November%202006%20until%20November%202008.%20Treatments%20consisted%20of%20five%20ecotypes%2C%20i.e.%20West%20Lombok%2C%20Central%20Lombok%2C%20East%20Lombok%2C%20Sumbawa%2C%20and%20Bima.%20The%20results%20showed%20that%20flowering%20of%20physic%20nut%20West%20Nusa%20Tenggara%20ecotypes%20was%20produced%20continuously%20during%20a%20year%2C%20while%20the%20peak%20number%20of%20flower%20was%20only%20twice%20e.g.%20at%20the%20early%20%28November-February%29%20and%20at%20the%20end%20%28April%E2%80%93May%29%20of%20rainy%20season.%20Duration%20of%20the%20flowering%20process%20took%20around%203%20days%20for%20female%20flower%2C%20around%202%20days%20for%20male%20flower%2C%20and%207-10%20days%20for%20total%20flower%20per%20inflorescence.%20Higher%20genetic%20potential%20for%20female%20flower%20formation%20was%20found%20on%20West%20Lombok%2C%20Sumbawa%2C%20and%20Bima%20ecotype.%20This%20result%20should%20be%20useful%20information%20for%20breeding%20programme%20of%20physic%20nut.%20However%2C%20since%20physic%20nut%20is%20a%20perennial%20plant%2C%20further%20study%20is%20needed%20especially%20on%20the%20technology%20to%20control%20flowering.%20%3C%2Fem%3E%3C%2Fp%3E%20%3Cp%20class%3D%22BODYTEXT%22%3E%3Cem%3E%C2%A0%3C%2Fem%3E%3C%2Fp%3E%20%3Cp%20class%3D%22BODYTEXT%22%20style%3D%22text-indent%3A0in%3B%22%3E%3Cem%3EKeywords%3A%20dry%20season%2C%20flowering%2C%20fruiting%2C%20rainy%20season%2C%20%3C%2Fem%3E%3C%2Fp%3E%20%3Cp%20class%3D%22BODYTEXT%22%20style%3D%22text-indent%3A0in%3B%22%3E%3Cem%3E%C2%A0%3C%2Fem%3E%3C%2Fp%3E/3169