West Angkola sub-districts and South Angkola are salak areas center of South Tapanuli that partly has undulating to hilly topographic with steep slopes that are potentially eroded. This study aims to determine the sediment trap and river on the land in the district Angkola West and East as well as the correlation between sediment discharge to the river flow and rainfall. The method used was survey methods and data analysis to quantify the Water Catchment Area for each Watershed by using software tools Arc Geographic Information System ( GIS ) 10.1. Sediment discharge calculated using the evaporation method. Regression data analysis using the software SPSS 19. Results showed the highest sediment discharge analysis on analysis in March in the District of East Angkola is 5.56 tons/day, while in April amounted to 9.2 tons/ha. Results of the analysis of sediment discharge peak in March in the District of West Angkola amounted to 0.74 tons /ha, while in April the sediment discharge is 1.1 ton/ha.
Abstract. Nasution Y, Rasyidin A, Yulnafatmawita, Saidi A. 2019. Evaluation of Salacca sumatrana as soil conservation crop in South Tapanuli, North Sumatra, Indonesia. Biodiversitas 20: 664-670. Salacca sumatrana Becc (snake fruit; or ‘Salak' in local name) is a profitable commodity. Morphologically, it is characterized by low, wide canopy that is potential intercept rainfall, while its roots are able to withstand soil erosion. This study is aimed to evaluate one variety of S. sumatrana named ‘salak sidimpuan" as commodity crop soil conservation based on its capability to intercept rain and trap soil sediment in the catchment area of S. sumatrana field. The research was conducted on mineral soils at West Angkola Sub-district, South Tapanuli District, North Sumatra Province, Indonesia with an altitude of 350-880 m above sea level. The study was carried out from October 2016 until March 2017 using survey method to calculate on rainfall interception, stemflow and throughfall while measurement of sediment used evaporation method. Statistical analysis was used to observe the difference of sediment trapped on the catchment area of S. sumatrana agroforest and the catchment area of mixed forest using Mann-Whitney Test. The results show that rainfall interception on S. sumatrana agroforest is 74.33% of the average rainfall while the Mann-Whitney Test Sig (2-tailed) is 0.000, indicating significant difference in trapping soil sediment between S. sumatrana agroforest and mixed forest. The amount of soil erosion on the catchment of S. sumatrana agroforest is 15.12 ton/ha/year while the erosion on mixed forest is 194.85 ton/ha/year. Thus S. sumatrana plant is capable to withstand rain interception with the result that soil erosion can be held in the catchment area of S. sumatrana agroforest. Instead of the calculation rain interception and soil erosion, then S sumatrana is classified as a soil conservation crop.
ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh pemberian sabut kelapa (Cocopeat), dan pupuk kandang terhadap pertumbuhan dan produksi tanaman cabai rawit. Penelitian ini dilaksanakan di Kampus 1 Torsimarsayang Fakultas Pertanian Universitas Graha Nusantara kota Padangsidimpuan. Penelitian ini menggunakan metode Rancangan Acak Kelompok (RAK) non Faktorial dengan 4 (empat) perlakuan dan 6 (enam) ulangan. Perlakuan antara lain : P0 (tanah 5 kg kontrol), P1 (tanah 5 kg + 70 g Cocopeat /pot), P2 (tanah 5 kg + 70 g Cocopeat + 70 g kotoran kambig/pot), P3 (tanah 5 kg + 70 g Cocopeat + 700 g kotoran sapi/pot). Parameter yang diuji yaitu tinggi tanaman, jumlah daun dan produksi perpot. Data yang diperoleh dianalisa secara statistik dengan uji ANOVA (Analysis of Varians) pada α = 5% dan dilanjutkan dengan uji Beda Jarak Nyata Duncan (Duncan’s Multiple Range Test). Hasil penelitian menunjukkan perlakuan media tanam (Cocopeat) dan berbagai jenis pupuk kandang berpengaruh nyata terhadap pertumbuhan tinggi tanaman dan jumlah daun. Dengan demikian perlakuan media tanam cocopeat dan pupuk kandang memberikan pengaruh yang nyata terhadap pertumbuhan cabai rawit. Kata kunci: Cabai rawit, cocopeat, pupuk kandang. ABSTRACT This study aims to determine the effect of awarding cocopeat and manure on the growth and production of cayenne pepper plants. The research was carried out at Campus Torsimarsayang, Faculty of Agriculture, University of Graha Nusantara, Padangsidimpuan. This study used a non-factorial Randomized Block Design (RAK) method with 4 (four) treatments and 6 (six) replications. The treatments were: P0 (control), P1 (5 kg soil + 70 g Cocopeat/pot), P2 (5 kg soil + 70 g Cocopeat + 70 g goat manure/pot), P3 (5 kg soil + 70 g Cocopeat + 70 g cow manure/pot). Observations included plant height, number of leaves and plant production. The data obtained were analyzed statistically with 5% ANOVA (Analysis of Variance) test and continued with Duncan's Multiple Range Test. The results showed that the treatment of planting media (Cocopeat) and various types of manure had a significant effect on the growth of plant height and number of leaves. Thus, the treatment of cocopeat growing media and manure gave a significant effect on the growth of cayenne pepper. Keywords : Cayenne pepper, cocopeat, manure.
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