Pengaruh Mulsa Sekam, Jerami Padi, Alang-Alang, Dan Plastik Hitam Perak Terhadap Laju Evaporasi.

Navratilova, Ghufrillah (2014) Pengaruh Mulsa Sekam, Jerami Padi, Alang-Alang, Dan Plastik Hitam Perak Terhadap Laju Evaporasi. Sarjana thesis, Universitas Brawijaya.

Abstract

Lahan kering memiliki beberapa kendala, salah satunya adalah asupan air yang bergantung dari air hujan, sehingga lengas tanah rendah akibat adanya evaporasi (penguapan) yang tinggi. Evaporasi (penguapan) adalah peristiwa berubahnya air menjadi uap yang bergerak dari permukaan tanah dan permukaan air ke udara yang menyebabkan kehilangan air cukup besar pada daerah pertanian. Untuk mempertahankan lengas tanah perlu dilakukan suatu usaha konservasi, misalnya penggunaan mulsa. Penelitian ini dilakukan untuk mengetahui pengaruh pemberian mulsa terhadap laju evaporasi. Penelitian dilakukan di Gunung Sari Kecamatan Beji Kabupaten Pasuruan dan di Laboratorium Fisika dan Kimia Jurusan Tanah, Fakultas Pertanian Universitas Brawijaya Malang yang dilaksanakan pada bulan Mei - Juli 2013. Penelitian dilakukan pada tanah dengan ordo Vertisol dengan perlakuan tanpa mulsa (kontrol), mulsa anorganik (plastik hitam perak), dan mulsa organik (jerami, sekam dan alang-alang). Penelitian menggunakan Rancangan Acak Kelompok dengan 5 perlakuan dan 3 kali ulangan. Pengamatan dilakukan selama 1 bulan pada hari setelah terjadi hujan dan tidak terjadi hujan dengan parameter pengamatan yaitu suhu tanah, laju evaporasi dan kadar air. Hasil penelitian menunjukkan bahwa metode lisimeter mikro dan gradien lengas tanah berpengaruh terhadap laju evaporasi tanah. Evaporasi menggunakan metode lisimeter mikro dan gradien lengas tanah berhubungan erat (r = 0,83) dan nyata (R2 = 0,69). Penggunaan mulsa mampu mempertahankan suhu tanah tetap stabil, dan mampu mempertahankan lengas tanah tetap tinggi dibandingkan dengan tanpa menggunakan mulsa. Mulsa plastik hitam perak memiliki kemampuan menekan laju evaporasi lebih tinggi dibandingkan dengan mulsa jerami, sekam dan alang-alang. Suhu tanah memiliki hubungan yang erat (r = 0,82) dan nyata (R2 = 0,67) dengan laju evaporasi, semakin tinggi suhu tanah maka laju evaporasi semakin tinggi. Suhu udara memiliki hubungan yang erat (r = 0,73) dan nyata (R2 = 0,54) dengan laju evaporasi, dan kadar air memiliki hubungan yang erat (r = 0,98) dan nyata (R2 = 0,96) dengan laju evaporasi, semakin besar jumlah kadar air dalam tanah maka laju evaporasi semakin tinggi.

English Abstract

Dry land has some problems, one of which is the water input that depends from the rain, thus causing low soil moisture due to high evaporation. Evaporation is the changing of water into steam that moves from the surface of the ground and the surface of water into the air which causes the loss of large amounts of water in agricultural areas. To maintain a soil moisture, some conservation are needs, for example is the use of mulch. This study was conducted to determine the effect of mulching on evaporation rate . The research was conducted in Gunung Sari, Beji, Pasuruan and the laboratory soil physics and chemistry, Faculty of Agriculture, University of Brawijaya. This research is conducted in May until July 2013. The study was conducted on Vertisol soil with no mulch (control), inorganic mulch (black silver plastic), and organic mulch (straw,husks and reeds). Research using randomized block design with 5 treatments and 3 replications. Observations made during the first month on the day after a rain and the rain does not occur with the observation parameters, namely soil temperature, evaporation rate and water content . The results showed that the lisimeter micro method and soil moisture gradients method indicate that the use of mulches affect soil evaporation rate. Lisimeter micro evaporation method and soil moisture gradients method are closely related (r = 0,83) and significant (R2 = 0,69). The use of mulch is able to maintain the soil temperature remains stable, capable, and able to maintain soil moisture remains high compared to without the use of mulch. Plastic mulch has the ability to suppress the evaporation rate is higher than the mulching straw, husks and reeds . Soil temperature has a strong relationship (r = 0,82) and significant (R2 = 0,67) with the rate of evaporation. If the soil temperature is higher, the evaporation rate is also increase. The air temperature has a strong relationship (r = 0,73) and significant (R2 = 0,54) with the rate of evaporation, and the water levels have a close relationship (r = 0,98) and significant (R2 = 0,96) with the evaporation rate , if the amount of moisture in the soil is high so the evaporation rate is higher.

Item Type: Thesis (Sarjana)
Identification Number: SKR/FP/2014/95/051402415
Subjects: 500 Natural sciences and mathematics > 551 Geology, hydrology, meteorology
Divisions: Fakultas Pertanian > Ilmu Tanah
Depositing User: Budi Wahyono Wahyono
Date Deposited: 23 Apr 2014 14:21
Last Modified: 19 Oct 2021 03:53
URI: http://repository.ub.ac.id/id/eprint/130060
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