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- 저자 : Mindawati Nina (검색결과 3 건)
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Widyati Enny,Sutiyono,Darwo,Mindawati Nina,Yulianti Mira,Prameswari Diana,Abdulah Lutfy,Yuniarti Karnita,Baral Himlal 한국산림과학회 2022 Forest Science And Technology Vol.18 No.1
To produce large volumes of biomass for implementing its green energy policy, the Government of Indonesia has issued a short rotation energy plantation program for a num- ber of tree species including Calliandra calothyrsus (Meissn.). Optimum density and prompt harvesting are needed to maximise productivity, but information regarding both factors is insufficient. This study aimed to investigate the optimum growth spacing and ideal felling age to produce the largest volumes of biomass both economically and sustainably. Experiments were arranged on one hectare of land, which was divided into four plots with different plant spacing treatments (1 1.5 m; 1.5 1.5 m; 2 1.5 m; and 2 2 m). Growth and yield observations were carried out on plants aged 12, 18, and 24 months in each plot, with 30 sample trees left for growth observations and ten sample trees cut at each of the three ages after planting. This resulted in a total of 240 samples from the 2,710 trees planted. Trees were felled at 50 cm from the soil surface, and the resulting stools were left to regrow. A year after felling, resulting coppices, were observed and cut. Growth, productiv- ity and calorific value were studied for both ‘primary’ and ‘coppiced’ wood. Study results demonstrate that competition between plants strongly determines the growth and product- ivity of ‘primary’ wood. The plot with the densest plant spacing had the lowest nutrient con- tent for almost all soil nutrients. Higher plant density showed higher competition index values, and resulted in fewer and smaller diameter stems emerging from stools, and lower biomass productivity. Competition index values, which increased with plant age, can be used as an indicator for determining harvest timing. Productivity increased by up to 15% fol- lowing development as a coppice plantation. Optimum wood productivity and greatest economy came from parent stands with plant spacing of 2 2 m, harvested at 18 months old and coppiced. This treatment yielded an average biomass/tree of primary wood 7.2 kg and coppice wood 8.22 kg, respectively, with lignin content of approximately 22%, and calor- ific value of around 18,807 kJ. These values match biomass energy requirements for feed- stock for electricity generation. Harvesting at 24 months showed no significant increases in productivity, lignin content, or calorific value.
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Smart agroforestry for sustaining soil fertility and community livelihood
Octavia Dona,Murniati,Suharti Sri,Hani Aditya,Mindawati Nina,Suratman,Swestiani Dila,Junaedi Ahmad,Undaharta Ni Kadek Erosi,Santosa Purwanto Budi,Wahyuningtyas Reni Setyo,Faubiany Varenna 한국산림과학회 2023 Forest Science And Technology Vol.19 No.4
Smart Agroforestry (SAF) is believed to be one of the alternative solutions in implementing sustainable forest management to achieve the community welfare. SAF provides agricultural and silvicultural knowledge and practices that aims not only for recovering the environmen- tal attributes but also for increasing farmers resilience. However, the benefits of agroforestry related to soil fertility in optimizing the land productivity and governing the community live- lihood are often overlooked and have not been well discussed. This review aims to describe how smart agroforestry practices in various regions in Indonesia and several other countries have significantly contributed to maintaining soil fertility and increasing crop production while assuring profitable benefits for the community. This review paper focuses on discus- sing the role of SAF in sustaining soil fertility and community livelihood in tropical and non- tropical regions. The review article was based on a synoptic review approach to SAF and Soil Fertility-related relevant publications and nationwide experiences. The review compiled and analyzed information from national and international research papers in various online scientific journals, conference proceedings and relevant books, to gain a comprehensive understanding of the topic being discussed. The study utilized a qualitative approach and drew upon primary and secondary sources based on a systematic review. Agroforestry has a significant role in recycling soil nutrients from the materials in the surrounding environment. SAF influences soil fertility physically, chemically and biologically. SAF practices in both wet and dry lands can contribute significantly to the community’s income. This review unveils the latent potential and the role of SAF in sustaining soil fertility that supports the community’s livelihood and can serve as impetus for future research.
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Naning Yuniarti,Yulianti,Dede J. Sudrajat,Nurhasybi,Muhammad Zanzibar,Dida Syamsuwida,Nina Mindawati,Ahmad Junaedi,Kurniawati Purwaka Putri,Evayusvita Rustam,Nurin Widyani,Yosephin Martha 한국산림과학회 2023 Forest Science And Technology Vol.19 No.3
Red jabon (Neolamarckia macrophylla) is one of potential tree species, but there are some problems in its cultivation. Intermediate seed character and very small seed sizes with little food reserves often cause the low germination, low growth of the seedlings, and the sowing of the seeds to be too dense, resulting in an abnormal number of seedlings. The purpose of the research was to improve the seed germination and seedling quality of red jabon by adjusting the sowing density and seed invigoration treatment using hormonal and bioprim- ing. Two experiments were conducted, that is, (1) identification of optimal seed density on the several combinations of sowing media (top soil, rice husk and compost) and (2) evalu- ation of the most suitable hormonal priming (GA3) and biopriming (liquid organic fertilizer, LOF) applications. The use of top soil media with a seed density of 0.5 g/400 cm2 can pro- duce the highest pure live seed (PLS), that is, 721.67 seedlings/0.5 g. The seed treated by hormonal and bio-priming significantly affected the seed germination and seedling growth. Soaking seed in GA3 100 ppm for 4 days produced the highest of the PLS (764 seedling- s/0.5 g), followed by soaking in LOF for 3 days and GA3 50 ppm for 4 days. The highest seed- ling height was generated from soaking the seeds using LOF for 3 days. The highest root collar diameter and biomass of red jabon seedlings were obtained from the treatment of seeds immersed in the GA3 50 ppm for 3 days. The best quality index value of red jabon seedlings was produced from the treatment of seeds immersed in the hormone GA3 50 ppm for 3 days. In general, a sowing density of 0.5 g/400 cm2 in top soil media and seed soaking treatment in GA3 50 ppm or LOF for 3 days can improve germination and growth of red jabon seedlings.
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