Jurnal Pertanian Tropik

Growth, Yield and Efficiency of Nitrogen Fertilization of Shallots in Dosage of Nitrogen Fertilizer and Cow Manure

2023-01-09T10:48:49+07:00

This research was conducted to determine the effect of nitrogen fertilizer and cow manure on the growth, yield, and efficiency of shallot plant growth. This research was conducted in the rice fields of Brebes, Brebes Regency. This study is a factorial experiment using a randomized block design (RAK) with two factors. The first factor is the application of nitrogen fertilizer 1/3 N (Urea) + 2/3 N (ZA) which consists of 4 levels, namely 0 N kg/ha (N0); 100 N kg/ha (N1); 200 N kg/ha (N2) and 300 N kg/ha (N3). The second factor is the application of organic material of cow manure with 4 levels, namely 0 t/ha (K0); 10 t/ha (K1); 20 t/ha (K2) and 30 t/ha (K3). There were 16 treatments, each treatment was repeated three times. plant height, number of leaves, leaf area (g), number of tillers per plant, number of tubers per plant, fresh weight of plant per clump (g), weight of tuber per clump (g), dry weight of plant per clump (g), weight of tuber dry per clump (g), tuber volume per clump (mL), N uptake (g), fertilization efficiency N (%). Observational data were analyzed with the F test to determine the diversity and if there was a significant difference, proceed with DMRT with an error rate of 5%. The results showed that the administration of a nitrogen dose of 200 kg N/ha was able to increase the growth and yield of shallots compared to other treatments. The best efficiency of N fertilization was in the application of 100 kg N/ha nitrogen fertilizer.

Potential of Bio-Silica From Palm Oil Waste As a Rehabilitation of Dry Marginal Land on Corn (Zea mays L.) Planting

2023-11-17T11:09:36+07:00

Food estate merupakan program unggulan pemerintah dalam mengatasi krisis pangan akibat Covid-19. Program ini menggunakan tanah ultisol yang memiliki kesuburan rendah karena memiliki pH dan silika yang rendah. Penelitian ini bertujuan untuk meningkatkan kesuburan tanah ultisol dengan pemberian pupuk biosilika dari limbah cangkang kelapa sawit agar meningkatkan produktivitas tanaman jagung (Zea mays L.). Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan 5 taraf perlakuan dan 4 ulangan. Perlakuan pemberian pupuk biosilika sebanyak 0 g/polybag(S0) sebagai kontrol, 10 g/polybag (S1), 20 g/polybag (S2), 30 g/polybag (S3), dan 40 g/polybag (S4). Parameter yang diamati pada pupuk biosilika berupa uji FTIR, pada tanah ultisol berupa uji pH, P tersedia, Si tersedia, dan daya hantar listrik (DHL), sedangkan pada tanaman jagung meliputi tinggi tanaman, jumlah daun, bobot kering akar, bobot kering tajuk, dan serapan P. Data diolah menggunakan software IBM SPSS Statistic 25 dan dianalisis menggunakan analisis keragaman (Anova) pada taraf uji 5%. Hasil penelitian menunjukkan bahwa limbah cangkang kelapa sawit mengandung silika sehingga dapat digunakan sebagai pupuk biosilika. Pemberian pupuk biosilika pada tanah ultisol mampu meningkatkan pH dan P tersedia sehingga meningkatkan serapan P dan pertumbuhan tanaman jagung. Perlakuan terbaik diperoleh pada perlakuan pemberian pupuk biosilika sebanyak 30 g/polybag (S3).