Electronic Theses and Dissertation

Inceptisol merupakan tanah yang belum matang (immature) dengan perkembangan profil yang lemah dan masih banyak menyerupai sifat bahan induknya, Inceptisol memiliki tingkat kesuburan yang rendah. Maka dari itu dalam pengelolaannya diperlukan upaya yang dapat membantu meningkatkan kesuburan tanah, misalnya melalui pemberian pupuk kandang dan pupuk hayati. Pemberian pupuk kandang dan pupuk hayati tidak hanya dapat menambah unsur hara pada tanah tetapi juga memperbaiki sifat-sifat tanah seperti Inceptisol.
Penelitian ini menggunakan rancangan acak kelompok dengan lima perlakuan dan empat ulangan. Perlakuan yang diuji yaitu, kontrol; P1 = 0,0035 ml pupuk hayati + 12,5 pupuk kandang; P2 = 0,0035 ml pupuk hayati + 25 g pupuk kandang; P3 = 0,0035 ml pupuk hayati + 37,5 g pupuk kandang; P4 = 0,0035 ml pupuk hayati + 50 g pupuk kandang. Pengamatan yang diamati pada sifat biologi tanah yaitu, total mikroorganisme, mikroorganisme pelarut fosfat, Azotobacter sp dan respirasi tanah. Sedangkan pengamatan terhadap kimia tanah yaitu pH (H2O), C-Organik (%), N-Total (%), dan C/N rasio. Data pengamatan di olah dengan menggunakan analisis ragam (ANOVA). Apabila perlakuan menunjukkan pengaruh nyata maka dilanjutkan dengan uji Beda Nyata Jujur (BNJ) pada taraf 5%.
Hasil penelitian menunjukkan kombinasi pupuk hayati dan dosis pupuk kandang dapat meningkatkan pertumbuhan tanaman jagung pada tinggi tanaman, jumlah daun dan diameter batang umur 21 hari setelah tanam (HST). Namun tidak dapat meningkatkan pertumbuhan tanaman jagung pada tinggi tanaman, jumlah daun dan diameter batang umur 7 dan 14 HST. Kombinasi pupuk hayati dan dosis pupuk kandang dapat menigkatkan pH, respirasi tanah serta N-Total. Namun belum meningkatkan terhadap C-Organik, C/N Rasio, Total mikroorganisme, Mikroorganisme pelarut fosfat, dan Azotobacter sp. Aplikasi 0,0035 ml pupuk hayati + 50 g pupuk kandang memberikan pengaruh terbaik terhadap pertumbuhan tanaman jagung.

Inceptisol is an immature soil with weak profile development and still resembles the nature of its parent material, Inceptisol has a low fertility level. Therefore, in its management, efforts are needed that can help increase soil fertility, for example by providing manure and biological fertilizers. Providing manure and biological fertilizers can not only add nutrients to the soil but also improve soil properties such as Inceptisol. This study used a randomized block design with five treatments and four replications. The treatments tested were control; P1 = 0.0035 ml of biological fertilizer + 12.5 manure; P2 = 0.0035 ml of biological fertilizer + 25 g of manure; P3 = 0.0035 ml of biological fertilizer + 37.5 g of manure; P4 = 0.0035 ml of biological fertilizer + 50 g of manure. Observations observed on soil biological properties were total microorganisms, phosphate-solubilizing microorganisms, Azotobacter sp and soil respiration. Meanwhile, observations of soil chemistry were pH (H2O), C-Organic (%), N-Total (%), and C/N ratio. Observation data were processed using analysis of variance (ANOVA). If the treatment showed a significant effect, it was continued with the Honestly Significant Difference (HSD) test at the 5% level. The results showed that the combination of biofertilizer and manure doses could increase the growth of corn plants in plant height, number of leaves and stem diameter at 21 days after planting (DAP). However, it could not increase the growth of corn plants in plant height, number of leaves and stem diameter at 7 and 14 DAP. The combination of biofertilizer and manure doses could increase pH, soil respiration and N-Total. However, it has not increased C-Organic, C/N Ratio, Total microorganisms, Phosphate-solubilizing microorganisms, and Azotobacter sp. Application of 0.0035 ml of biofertilizer + 50 g of manure gave the best effect on the growth of corn plants.