V. KESIMPULAN DAN SARAN A. Kesimpulan
Dari hasil dan pembahasan dapat disimpulkan sebagai berikut : 1. Perlakuan Sistem Olah Tanah baik Sistem Olah Tanah Intensif OTI, Olah Tanah
Minimum OTM, dan Tanpa Olah Tanah TOT tidak berpengaruh nyata meningkatkan biomasa karbon mikroorganisme C-mik dan produksi tanaman
jagung. 2. Pemupukan N 200 kg ha
-1
berpengaruh nyata meningkatkan biomasa karbon mikroorganisme tanah pada saat masa vegetatif tanaman jagung, tetapi tidak nyata
pada saat sebelum perlakuan, dan berpengaruh nyata terhadap produksi tanaman. 3. Tidak terdapat interaksi antara sistem pengolahan tanah dengan pemupukan N
terhadap peningkatan biomasa karbon mikroorganisme dan produksi tanaman jagung.
B. Saran
1. Perlu diadakan penelitian lanjutan mengenai pengaruh berbagai sistem olah tanah terhadap biomasa mikroorganisme tanah C-mik dan produksi tanaman jagung.
2. Berdasarkan hasil uji korelasi disarankan untuk menggunakan dosis pupuk N diatas 200 kg ha
-1
untuk melihat hasil optimal biomasa mikroorganisme tanah C-Mik dan produksi jagung.
ABSTRACT STUDY OF CONSERVATION TILLAGE SYSTEM AND LONG TERM
NITROGEN FERTILIZATION FOR THE SOIL BIOMASS CARBON MICROORGANISM C-MIC AND CORN Zea mays L. PRODUCTION
IN ULTISOL SOIL By
ADITYA KIRANA
Indonesia is an agricultural country who most of people work as farmers. One of the most important process in planting is a soil tillage. For the short term,
intensive tillage can improve soil physical problem, but in the long term can cause damage to the soil. To reduce the negative impact need to implement soil
conservation tillage systems. Soil conservation tillage system is a system of land preparation that aims to prepare the land for crops to grow and produce optimum,
but still concern for soil and water conservation. Nutrient of nitrogen is the most important element for plants, except that the N element is also required for soil
microorganism in order to continue activity.
This study aims to determine biomass carbon microorganism C-mic and corn productivity in three kinds of soil tillage system Intensive tillage, Minimum
tillage, and No tillage and long term nitrogen fertilization effect.
This research by using a randomized block design RAK and arranged in a factorial 3x3 with 4 replications. The first factor in this research is the treatment
of tillage system T, namely T
1
= intensive tillage, T
2
= minimum tillage, T
3
= no tillage, and the second factor in this study were long-term nitrogen fertilization
N, N = 0 kg N ha
-1
, N
1
= 100 kg N ha
-1
and N
2
= 200 kg N ha
-1
. The soil samples were taken at three points of each plot at the one day before processing of
land and when corn reached maximum vegetative. The result were tested for the homogenity by Bartlet test, aditifity test by Tukey test, and then analysis of
variety, and continued with Honestly Significant Difference test 5 and correlation test between N fertilizer and C-Mic, Production, and C-mic with corn
production.
The results showed that overall of Intensive Tillage, Minimum Tillage, and No Tillage did not significantly increase biomass carbon of microorganism C-mic
and corn production. N fertilization 200 kg N ha
-1
significantly increased biomass Aditya Kirana
carbon microorganism during the vegetative plant corn, but not significant at the time before tillage and significantly affected for crop production. There was no
interaction between soil tillage system with N fertilization to increase biomass carbon of microorganism and corn production.
Keywords: Conservation tillage systems, N fertilization, soil microorganism biomass, corn production.
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A. Latar Belakang
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