Evaluasi Sifat Biologi Tanah Tanaman Kopi Arabika (Coffea arabica L.) di Beberapa Kecamatan di Kabupaten Mandailing Natal

ABSTRACT

Coffee is one of the agricultural commodities that has a sufficiently high economic

value. Mandailaing Natal is the one of the coffee-producing areas in Indonesia. This

study aimed to evaluate the biological properties of the soil, among others organic

carbon, total nitrogen, total soil respiration and total soil microorganisms to the

production of coffee. This study conducted using survey method. Samples were taken

at random method deliberately based on deployment coffee plants from various

altitudes. The measured parameters were soil organic carbon, total nitrogen, soil

respiration and total soil microorganisms. Data were tested with the data assuming a

classic, correlation and regression analysis. The results showed that the biological

properties of soil associated with the production were not significant. The

correlation between biological properties of the soil with the production of coffee

was low.

Keywords :

Soil Biology Characteristic, Coffee Production, Regression

ABSTRAK

Kopi merupakan salah satu komoditas pertanian yang mempunyai nilai ekonomi

cukup tinggi. Daerah Mandailing Natal merupakan salah satu daerah penghasil kopi

di Indonesia. Penelitian ini bertujuan untuk mengevaluasi sifat biologi tanah antara

lain C

–

organik, N

–

total, respirasi tanah dan total mikroorganisme tanah terhadap

produksi kopi. Penelitian ini dilakukan metode survei. Sampel diambil dengan

metode acak sengaja berdasarkan ketinggian tempat dengan parameter yang diukur

yaitu C

–

organik, N

–

total, respirasi tanah dan total mikroorganisme tanah. Data

diuji dengan asumsi data klasik, analisis korelasi dan regresi. Hasil penelitian

menunjukkan bahwa sifat biologi tanah berhubungan tidak nyata dengan produksi.

Korelasi antara sifat biologi tanah terhadap tanaman kopi tergolong rendah.

Kata kunci :

Sifat Biologi Tanah, Produksi Kopi, Regresi