Judul: Jumlah Polen Kelapa Sawit dan Viabilitasnya pada Tubuh Kumbang Jantan Elaeidobius kamerunicus Faust.
Abstrak: Elaeidobius kamerunicus Faust. is a weevil pollinator of oil palm. These weevil transfer pollen from male to female inflorescences of oil palm (Elaeis guineensis). The aim of the research were to study pollen load and its viability on male weevils E. kamerunicus as a pollinator of oil palm. Male weevil E. kamerunicus was submerged in etanol 70% : gliserol (4:1) solution and was rotated during 24 hours. After those, weevil was outed, the solution was sentrifugated and pollen in each individual weevil was counted with haemacytometer. Other weevils were immobilized by ethyl acetate were counted of pollen loads in each body of the weevil. To measure viability pollen, were germinated in sucrose 8% and boric acid 15 ppm solution and were counted its viability after 2 hours of treatment. Result showed that male weevil E. kamerunicus carried 3258 pollen grains. Most pollen grains were carried by weevil in the elytra (1067 pollen grains), head (495 pollen grains), and abdomen (296 pollen grains), respectively. Less pollen (27 pollen grains) attached in antenna. The pollen shape of oil palm is triangel with aperture type, that is tricolpata, 38 μm in long and 30 μm in wide. In the germination process, pollen tube’s long between was 60 μm-700 μm. Pollen viability carried by male weevils was 74,18%.
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Judul: Demography and Population of Elaeidobius kamerunicus Faust (Coleoptera:Curculionidae) as a Pollinator of Oil Palm (Elaeis guineensis Jacq) in PT. Agri Andalas Plantation, Bengkulu Province
Abstrak: Elaeidobius kamerunicus is an insect pollinator of oil palm. These weevil live and thrive in the male flowers of oil palm. The aims of the research were to study demography and population of E. kameunicus in male flower of oil palm. Demography study of the weevil were observed in the laboratory. One individual male and female of weevil were reared in the box, feeding by one spikelet of male flower. Observation of demographic study were conducted from 2nd day after rearing, until the weevil died. Populations of E. kamerunicus in oil palm plantations were measured by using a sampling method. We selected nine spikelet per bunch of male flower and counted the number of weevil per spikelet. The number of weevil per spikelet and number of spikelet per bunch were counted to determine the number of weevil per bunch. We counted the numbers of anthesis male flower per hectare to determine the number of weevil per hectare. Environmental parameters i.e temperature, humidity, light intensity, and rainfall were measured. The relationship between weevil population and environmental parameters were analyzed by Principal Component Analysis (PCA). Results showed that weevil E. kamerunicus tooks 14-17 days to grow from egg to imago. Statistics demography of the weevil were: generation time (T) was 19 days, gross reproduction rate (G) was 11 individuals, the net reproductive rate (Ro) was 5 individual and intrinsic growth rate (r) was 0.24. Population of the weevil on oil palm age 3 and 6 years were higher in January (41.102 individuals per hectare) and February (153.226 individuals per hectare). While, the lower population of the weevil were found in March (22.618 individuals per hectare) and April (98.693 individuals per hectare). In average, fruit set of oil palm age 3 and 6 years were 82,8% and 83,3%, respectively.
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Judul: Pengelolaan Data Spasial Darat Menggunakan Objectrelational Database Management Systems (ORDBMS)
Abstrak: Rela/ional Do/abase Managemenl Systems (RDBMS) hanya mendukung tipe data dasar dengan operasi yang terbatas sehingga tidak elisien untuk pengelolaan data kompeks, seperti data spasial darat. Dalam RDBMS, geometri dan atribut data spasial darat dimodelkan dalam beberapa tabel sehingga diperlukan banyak operasijoin antara tabel pada saat kueri data. Objec/-Relalional Da/abase Mcwagemelll Systems (ORDBMS) mendukung perluasan tipe data dasar, objek kompleks dan pewarisan, sehingga lebih elisien untuk pengelolaan data spasial darat. Dukungan tcrhadap perluasan tipe data dasar melalui mekanisme tipe data bentukan mcmungkinkan untuk mendelinisikan tipe data baru yang spesilik untuk data spasial darat. Dukungan terhadap objek kompleks melalui mekanisme array dan tipe data komposit memungkinkan untuk memodelkan masing: masing geometri dan atribut data spasial darat sebagai objek kompleks tanpa mcnguraikannya kedalam . bentuk atomik. Geometri data spasial darat dimodelkan dalam tipe data komposit MDSYS.SDO_GEOMETRY, sedangkan atributnya dimodelkan dalam satu tipe data komposit DARAT_ATTRJBUTE. Dukungan terhadap perluasan tipe data dasar melalui mekanisme fungsi bentukan memungkinkan untuk mendefinisikan metode akses bagi tipe data bentukan, array dan tipe data komposit sehingga manipulasi data menjadi lebih elisien. Pada tabel yang menyimpan seluruh . informasi data spasial darat, tipe data komposit MDSYS.SDO GEOMETRY dijadikan sebagai tipe data pada kolom yang menyimpan informasi geometri, sedangkan tipe data komposit DARAT_ATTRIBUTE dijadikan sebagai tipe data pada kolom yang menyimpan informasi atribut. Dengan menyimpan informasi geometri dan atribut data spasial darat kedalam satu tabel maka dapat mengurangi operasi join antara tabel pada saat kueri data. Hal ini menunjukkan bahwa ORDBMS memberikan pendekatan yang lebih baik dalam pengelolaan data spasial darat.
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