Hubungan antara Kandungan Bahan Organik Tanah dengan Periode Pasca Tebang Tanaman HTI Acacia Mangium Willd.

Sabaruddin Sabaruddin,Lesi Lestari,Siti Nurul Aidil Fitri

doi:10.5400/jts.2009.v14i2.106-110

Abstract

Timber harvesting may have significant effects on soil organic matter content through mechanical disturbance, inputs of logging slash, alterations in litter production, and leaching of dissolved organic matter, as well as the alteration of temperature and moisture regimes. To investigate the effect of post-harvest period of tree harvesting on the dynamics of soil organic matter content, surface soils (0 to 10 cm and 10 to 20 cm) were collected from intact Acacia mangium Willd. plantation (control) and from A. mangiumWilld. harvested in 2001, 2002, 2004, and 2006 in four replicates. Each replicate consisted of composited 4 subsamples. Timber harvesting reduced litter accumulation on soil surface. However, the amount of litter accumulated on soil surface increased as post-harvest period increased. Timber harvesting significantly (p<0.001) affected soil organic matter content both in 0 to 10 cm and 10 to 20 cm. The increases in soil organic matter content were significantly correlated (r=0.85; p<0.001 in 0 to10 cm and r=0.62; p<0.01 in 10 to 20 cm) with post harvest period.

Highlights

IntroductionLong Leaf) is a vegetables with a high nutrition and vitamins content
As kailan has a big potential for human consumption, effort should be made through precise cultural technique to gain optimal production
The results showed that application of mulch did not affect plant height, total number leaves, plant fresh weight, plant dry weight and plant production in each plot

Summary

Introduction

Long Leaf) is a vegetables with a high nutrition and vitamins content. This crop belongs to Brassicaeae family and is one of the leave vegetables founded by the community (Yamaguchi 1983). As kailan has a big potential for human consumption, effort should be made through precise cultural technique to gain optimal production. The purposed cultural technique is the application of optimum fertilizers and mulching. The growth and yield of crops are depended on the optimal requirement of nutrient element for preparing the soil as a growing medium. Fertilizing will be done whenever the soil could not able to prepare nutrient elements in an adequate quantity for the plants. Potassium is one of the important macro elements for plant growth. Potassium is one of the important macro elements for plant growth. Oldham (2008) and Aljabri (2007) stated that the dynamic of K-forms in the soil comprises of mineral fixed K, un-exchangeable K

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