PENGARUH SISTEM OLAH TANAH DAN HERBISIDA TERHADAP KEHILANGAN UNSUR HARA DAN BAHAN ORGANIK AKIBAT EROSI DI LABORATORIUM LAPANG TERPADU FAKULTAS PERTANIAN UNIVERSITAS LAMPUNG
ABSTRACT: Land degradation is
a serious problem which can reduce the land fertility and productivity. The
main cause of the degradation is due to erosion phenomenon. It causes the
fertile top soil losses which is good for plant growth. Tillage farming is
particularly convinced as the prime
cause on soil erosion. This research aims to determining the effect of tillage
system and herbicide to predict the losses of nutrients and organic matter due
to erosion. This experiment was conducted at the Laboratory of Lapang Terpadu and Laboratory of Soil Science, Faculty of Agriculture,
University of Lampung in May to August 2014. The experiment was design as a
factorial in completely randomized block design (RCBD) consisting of two
factors, namely the tillage system and herbicide with 4 (four) repetitions. The
results showed that the treatment of soil tillage, herbicides, and the
combination of them did not significantly affect the concentration of N
(total), K (exchangable), Ca (exchangable), Mg (exchangable), and the C
(organic) matter in sediment. While the P (available), only the tillage systems
that provided significant effect. At a minimum tillage system P
(available) concentration was significantly higher than the conventional tillage system. This
was due to the nature of the immobil phosphorus, it mean the phosphorus in the
soil remains in the top soil otherwise mechanically inserted into the sub soil.
The limited tillage on minimum tillage systems causes phosphorus remain in the
top soil, so that when erosion occurs phosphorus losses in minimum tillage
system will be higher than in conventional tillage. The conventional tillage system causes loss
of P (available) of 0,016 kg/ha and the minimum tillage system causes loss of P
(available) of 0,01 kg/ha.
Penulis: Burhannudin, Irwan Sukri
Banuwa, Iskandar Zulkarnain
Kode Jurnal: jppertaniandd150020
