@misc{eprints12437,
           month = {Januari},
           title = {ANALISIS NERACA AIR TANAMAN JAGUNG (ZEA MAYS)
DI BANDAR LAMPUNG},
          author = {Muamar 0714071052},
            year = {2012},
         journal = {Digital Library},
             url = {http://digilib.unila.ac.id/12437/},
        abstract = {Abstrak

Jagung (Zea Mays) merupakan salah satu tanaman pangan penting di Indonesia
setelah padi. Kebutuhan masyarakat Indonesia terhadap tanaman pangan ini terus
meningkat seiring dengan pertumbuhan penduduk yang semakin meningkat juga.
Salah satu upaya peningkatan produktifitas guna mendukung program
pengembangan agribisnis tanaman jagung adalah penyediaan air yang cukup
untuk pertumbuhan tanaman.
Penelitian ini bertujuan untuk (1) menghitung besarnya kebutuhan air tanaman
jagung, (2) menghitung besarnya potensi air hujan yang dapat di manfaatkan dan
ditampung, (3) menganalisis evapotranspirasi, laju perkolasi dan limpasan, dan (4)
menghitung Kc tanaman.
Penelitian dilaksanakan di Laboraturium Lapang Terpadu Fakultas Pertanian
Universitas Lampung terhitung mulai tanggal 26 Agustus sampai 4 Desember
2011. Pengamatan lapangan dilakukan terhadap delapan plot percobaan dengan
dua perlakuan dan empat kali ulangan. Perlakuan tersebut adalah menggunakan
terpal (plot A) dan tanpa terpal (plot B) yang masing-masing dilengkapi dengan
kolam penampungan air pada bagian hilirnya.
Hasil penelitian menunjukan bahwa (1) total kebutuhan air konsumtif tanaman
jagung (ETc) selama penelitian sebesar 614,3 mm, (2) total limpasan yang terjadi
pada plot tanpa terpal adalah 37,24 mm, (3) perkolasi yang terjadi selama
penelitian di plot lahan tanpa terpal sebesar 40,58 mm, (4) nilai koefisien tanaman
jagung (Kc) rata-rata pada tahap perkembangan awal, tahap vegetatif, tahap
pembungaan dan formasi biji, dan tahap penuaan masing-masing adalah 1,17;
1,37; 1,38; dan 1,19, dan (5) produktifitas penggunaan air pada plot A sebesar
1,88 kg/m3 dan pada plot B sebesar 2,48 kg/m3.
Kata kunci: neraca air, jagung, evapotranspirasi, perkolasi, limpasan permukaan.




Abstract

Corn (Zea Mays) is one important crop in Indonesia after rice. Indonesia people
needs this crop continuous by increase since Indonesian population is growing.
One effort to support the production of corn is to supply adequate irrigation water.
This aims of this research were (1) to calculate the amount of irrigation water
required, (2) to quantify the potential rainwater can be harvested and use as
irrigation, (3) to analyze the crop evapotranspiration, percolation and runoff rate,
and (4) to determine Kc.
Plot experiment was conducted at the Integrated Field Laboratory College of
Agriculture, University of Lampung from 26 August to 4 December 2011. Field
observation was carried out on two experimental treatments with four replicates,
the treatment were plots with plastic liner (plot A) and without plastic liner (plot
B) each equipped with a water storage pond at the downstream.
The results showed that (1) the consumptive use (ETc) during the study water
requirements of corn is 614,3 mm, (2) total runoff that occurs on the plot without
plastic liner was 37,24 mm, (3) percolation that occurred during the study on the
plot without plastic liner was 40,58 mm, (4) the corn crop coefficient (Kc) on
average in the early developmental stages, vegetative stage, stage of flowering and
seed formation, and aging stage were 1,17; 1,37; 1,38; and 1 ,19, and (5) the water
productivity on plot A was 1,88 kg grain/m3 water, while on the plot B was 2,48
kg grain/m3 water.
Key words: water balance, corn, evapotranspiration, percolation, surface runoff.}
}