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Journal : Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian

PENGARUH PENINGKATAN DOSIS KALIUM DAN JENIS PESTISIDA NABATI TERHADAP PERSENTASE SERANGAN HAMA DAN PRODUKSI KENTANG DI SUMATERA UTARA Sidauruk, Lamria; Kaban, Masdasari; Sihombing, Parsaoran
Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Vol 4, No 1 (2019): Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian, Desember
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.444 KB) | DOI: 10.31289/agr.v4i1.2713

Abstract

Potato production in Karo and Simalungun Regency of North Sumatra is severely limited by the high number of pest attacks,  so that the use of pesticides is absolutely necessary. Increasing potassium doses and application botanical  pesticides can be used as a strategy to reduce pest attacks on potatoes. This study aims to determine whether an increase in potassium dose and application of some botanical pesticides can reduce the percentage of pest attacks and then increasing potato production. Research was designed by factorial Randomized Block Design (RBD) with 2 factors, namely Potassium Dosage consist of 4 levels: K0 = Control; K1 = 100 kg / ha (30 g / plot); K2 = 150 kg / ha (45 g / plot); K3 = 200 kg / ha (60 g / plot). And the second factor is the type of botanical pesticide which consist of 3 levels, namely: N1 = 20 g Neem leaves/ liter of water; N2 = 20 g babadotan leaves/ liter of water; N3 = 20 g Kipahit leaves/ liter of water. Data were analyzed by analyzed of variance.The results showed that an increase in potassium dosage did not significantly affect the percentage of pest attacks and plant production variables. Botanical pesticides have a significant effect on the percentage of pest attacks, but have not significant effect on crop production variables. The lowest percentage of pest attacks was obtained from the application of botanical  pesticides from babadotan leaf extract.  In general, the percentage of pest attacks in the category was very low  (<25%), so that not significantly affect to production variables.
PENGARUH PENINGKATAN DOSIS KALIUM DAN JENIS PESTISIDA NABATI TERHADAP PERSENTASE SERANGAN HAMA DAN PRODUKSI KENTANG DI SUMATERA UTARA Sidauruk, Lamria; Kaban, Masdasari; Sihombing, Parsaoran
Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Vol 4, No 1 (2019): Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian, Desember
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/agr.v4i1.2713

Abstract

Potato production in Karo and Simalungun Regency of North Sumatra is severely limited by the high number of pest attacks,  so that the use of pesticides is absolutely necessary. Increasing potassium doses and application botanical  pesticides can be used as a strategy to reduce pest attacks on potatoes. This study aims to determine whether an increase in potassium dose and application of some botanical pesticides can reduce the percentage of pest attacks and then increasing potato production. Research was designed by factorial Randomized Block Design (RBD) with 2 factors, namely Potassium Dosage consist of 4 levels: K0 = Control; K1 = 100 kg / ha (30 g / plot); K2 = 150 kg / ha (45 g / plot); K3 = 200 kg / ha (60 g / plot). And the second factor is the type of botanical pesticide which consist of 3 levels, namely: N1 = 20 g Neem leaves/ liter of water; N2 = 20 g babadotan leaves/ liter of water; N3 = 20 g Kipahit leaves/ liter of water. Data were analyzed by analyzed of variance.The results showed that an increase in potassium dosage did not significantly affect the percentage of pest attacks and plant production variables. Botanical pesticides have a significant effect on the percentage of pest attacks, but have not significant effect on crop production variables. The lowest percentage of pest attacks was obtained from the application of botanical  pesticides from babadotan leaf extract.  In general, the percentage of pest attacks in the category was very low  (<25%), so that not significantly affect to production variables.
Pemanfaatan Biochar dan Konsorsium Bakteri pada Remediasi Tanah Tercemar Logam Berat dan Pengaruhnya terhadap Hasil Tanaman Sawi (Brassica Juncea L.) Panjaitan, Ernitha; Sidauruk, Lamria
Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Vol. 8 No. 1 (2023): Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian, Desember
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/agr.v8i1.10627

Abstract

Salah satu metode pemulihan kualitas tanah tercemar logam berat adalah menggunakan teknik remediasi, yaitu kegiatan untuk membersihkan permukaan tanah yang tercemar. Penelitian ini menggunakan tanaman sawi yang ditanam pada media tanah tercemar logam berat Pb dan Cu, diinokulasi dengan konsorsium bakteri (corynebacterium glutamicum, lactobacillus sp.) dan arang sekam. Hasil penelitian menunjukkan konsentrasi logam berat Pb dan Cu, baik pada tanah maupun tanaman, nyata mengalami penurunan dengan semakin bertambahnya taraf inokulasi bakteri dan arang sekam. Rerata besar penurunan Pb pada tanah dan tanaman dengan perlakuan bakteri : 1,28% dan 0,29%; dan rerata penurunan kandungan Cu pada tanah dan tanaman : 1,03% dan 0,17%. Sedangkan rerata besar penurunan Pb pada tanah dan tanaman dengan perlakuan arang sekam masing-masing sebesar 0,44% dan 0,07%; dan rerata penurunan kandungan Cu pada tanah dan tanaman 0,34% dan 0,08%. perlakuan inokulasi bakteri pada taraf 5 g tanaman-1 dan arang sekam 20 g tanaman-1 mengakibatkan jumlah daun terbanyak. Tinggi tanaman sampai 4 minggu setelah tanam nyata mengalami peningkatan, sedangkan jumlah daun dan bobot basah nyata mengalami peningkatan sampai 5 minggu setelah tanam dengan pemberian arang sekam. Tanaman sawi dengan inokulasi bakteri dan pemberian arang sekam disamping dapat meningkatkan kesuburan tanah dengan memperbaiki sifat-sifat tanah, juga dapat berkontribusi terhadap stabilisasi logam berat pada tanah. Kata kunci : remediasi, logam berat Pb dan Cu, konsorsium bakteri,arang sekam