KANDUNGAN KALIUM TANAH DI BAWAH TEGAKAN JATI (Tectona grandis), MAHONI (Swietenia macrophylla), DAN LEGARAN (Alstonia spectabilis R.Br) DI DALAM PETAK UKUR PERMANEN (Studi Kasus di Hutan Pendidikan Wanagama I, Gunungkidul, Yogyakarta)

Wanagama I Forest was built as a pilot from rehabilitation of critical land pattern, and also used as an educational land even research for lecturer and students at the forestry faculty of UGM as well as by other institutions. So, at the Educational Forest of Wanagama I need to be made permanent sample plots (PSPs) to know about the increment of plant grow. PSPs is made on site and on different stands in order to represent the condition of the Educational Forest of Wanagama I. one that can be studied in PSPs is potassium content of soil. Potassium is the third most important element after N and P for plant. This study aims to determine potassium levels of soil from the stands of Teak, Legaran, and the Mahogany at educational Forest of Wanagama I. In research, data retrieval was doing at the field and laboratory, while the data retrieval from the field likes height, diameter, and sample of soil for analyzed in laboratory. In the laboratory analyzed potassium content of soil under the stands of teak, legaran, and mahogany with Atomic Absorption Spectrophotometer instrument and data were analyzed descriptively. From observation to potassium levels of soil under the stands of teak, legaran, and mahogany in the educational forest of wanagama I, it included in the criteria is very low at <0.1 me/100gr. Nutrient levels of potassium in each stand is on Teak 0.003 to 0.020 me / 100gr, on mahogany 0,005-0,013 me/100gr, and on legaran 0,020-0,038 me/100gr. This shows the soil at educational forest of wanagama I in the stand of teak, mahogany, and legaran was very lack of nutrient potassium, and also at educational forest of wanagama I needed treatment of potassium fertilization for plants to grow well

KANDUNGAN KARBON DAN BAHAN ORGANIK DALAM TANAH PADA TEGAKAN KI PUTRI (Podocarpus neriifolius), JATI (Tectona grandis), LEGARAN (Alstonia spectabillis R.Br) DI HUTAN PENDIDIKAN WANAGAMA I

Forest education as a means of learning Wanagama I then need to do research on available nutrients in forest soils Wanagama I. Plants require essential nutrients. Not all types of plants in Wanagama I was able to grow fast and lush, this is due to the influence of soil fertility as well as the suitability of the type of crop grown. One characteristic of fertile soil contains a lot of organic matter. Carbon is a constituent of most organic material so that the availability of carbon is strongly influenced by the amount of organic matter. The availability of organic matter in the soil also means the availability of carbon and energy source for soil microorganisms which are very dominant role in the reform process of organic materials. So the need for research on the content of soil Wanagama I to determine the content of organic matter and soil carbon. Samples were taken from 3 kinds of stands in the forest I Wanagama education whose land has not been processed. Vegetation type used is Legaran, Teak, and Ki daughter and soil depth (0-10, 10-20, 20-30, 30-50). The indicator used is the carbon content of organic matter in the soil and forest education Wanagama I. In the assay of organic matter and carbon elements used method of Walkey & Black (volumetric method), 77% were correct value, calculated expressed in Denntedt method (combustion method) which value is 100% truth. The analysis called quantitative volumetric analysis axisimetris. The results showed that the content of carbon in the land element unprocessed Wanagama I have high criteria at depths of 0-10 and 10-20, was at a depth of 20-30, 30-50 low on depth. Legaran: low, Teak (plot 7): very high, Teak (plot 6): high,Podocarpus : high

KANDUNGAN C-ORGANIK DAN N TOTAL SERESAH DAN TANAH PADA BERBAGAI UMUR TEGAKAN CEMARA UDANG HASIL REHABILITASI LAHAN PASIR PANTAI

Coastal land areas such as Samas, Kuwaru, and Goa Cemara are degraded land with soil texture dominated by sand fraction and the low amount of nutrient availability. To rehabilitate the coastal land, C. equisetifolia was planted in 1996, 2000, and 2004, respectively. This research aimed to determine C-organic and N total content of litter and soil in different ages of C. equisetifolia stand on rehabilitated coastal sandy area. The study was conducted in Goa Cemara, Kuwaru, and Samas with C. equisetifolia stand aged 8, 12, 16 years. respectively. Litter samples were taken from 1m x 1m quadratic wire and soil samples were taken with soil auger at depth of 0-10 cm, 10-20 cm, and 20-30 cm at each location with 3 replications. The litter was separated into fresh and fragmented litter and dried until reach a constant dry weight. Both values of N total and C-Organic of litter and soil samples were analyzed by Kjeldahl and Walkley and Black methods respectively. The result showed that the older of C. equisetifolia stand, the higher Corganic content of soil, while the N total content of litter, soil N total, and Corganik of litter were not increase. The deeper the soil layer, the lower of the soil C-organic and N total content. The significant decrease of soil C-organic contents in Kuwaru occured at depth of 0-10 cm, 10-20 cm, and 20-30 cm, which were 0.34%, 0.07%, and 0.05%. The significant decrease of soil N total contents occured at depth of 0-10 cm, 10-20 cm, and 20-30 cm, which were 0.04%, 0.02%, and 0.01%. C. equisetifolia stands were able to increase the soil C-organic and N total content of coastal sandy area. Eventhough the soil C-organic and N total content are classified as very low

PENGARUH KOMPOSISI KOTORAN JANGKRIK, AYAM DAN KAMBING DENGAN TANAH REGOSOL TERHADAP PERTUMBUHAN SEMAI SENGON LAUT

Seedling growth media requirements require physical-chemical properties of good. Physically, media should have high porosity so that the growth of seedling roots will not have problems. One of the good media, the organic materials that has decomposed completely because it can increase the porosity of media. While chemically media must be able to provide the nutrients necessary for the growth and development of the seedling. Currently increasing number of farmers cricket, chicken and goat feces throwing away waste. These impurities could be expected to improve soil physical and chemical properties that can be used as a media mixing of plant in order to get a good quality seedling. This research was aims to determine the mixing of ratio cricket dirt with regosol soils, chicken dirt with regosol soils and goat dirt with regosol soils on the growth of Seedling sengon sea until the age of three months. The method used, that is with measurement of growth parameters including height, diameter and rate of survival at Seedling sengon sea. This research use CRD design (Compelety Randomize Design) by treatment with three types of dirt, that is dirt cricket, chicken and goat mixed with regosol soils comparison, that is 1:1, 1:2, 1: 3 and control (without dirt). The results showed the survival rate sea sengon seedling highest on the composition of goat and soil mixing of regosol with a ratio of 1:3, of 100%. For high mean of sea sengon seedling was highest in the composition of goat and soil mixing of regosol with a ratio of 1:1, that is 1,23 cm. For diameter mean of sea sengon seedling was highest in the composition of goat and soil mixing of regosol with a ratio of 1:2, that is 0,012 cm

PENGARUH KOMPOSISI KOTORAN JANGKRIK DAN 3 JENIS TANAH YANG BERBEDA TERHADAP PERTUMBUHAN SEMAI SENGON LAUT SAMPAI UMUR 3 BULAN

One of the successful key of planting on field is the quality of seedling that going to plant. To produce a qualited seedling it needs perfect composition of media that has great porosity, aeration, and drainage. That�s why some materials to mix media that use is needed to find. This research made to find the impact of composition of crickets dirt and regosol soil, rendzina soil, and latosol soil for the growth of seedling sengonlaut(P. falcataria). This research use CRD (Completely Randomized Design) with 3 kind of soil and 1 organic material and control. Every treatment use 4 seedling and repeated 3 times. Characters that counts is the height, diametre, and percentage of life. The result of the research shows that dirt crickets given 3 different kind of soils doesn�t show any real impact to the seedling growth of sengonlaut, but seedling that plant on an mixture of dirt crickets media can survive till the end of observation. Control life percentage 100% and the height growth of seedling is 8,7 cm in regosol soil, 8,3 cm for rendzina soil, and 7,8 for latosol soil

PENGARUH KOTORAN JANGKRIK TERHADAP PERTUMBUHAN TIGA JENIS TANAMAN FAST GROWING

Every plant in the growth and development need nutrients, both macro and micro, therefore if the plant has a limited nutrition, it will make stunted growth. The stunted growth can be overcome by the fertilization. The importance of fertilizer makes the most of the public need a lot of fertilizer and it is needed to their plant. Lately, there are business lands that take advantage of crickets especially in big cities such as Bekasi. Utilization of manure waste into organic fertilizer crickets into potential along with the need for fertilizers is increasing. This research aims to determine the effect of impurities crickets on the growth of seedlings Sengon laut (Paraserianthes falcataria), Sengon buto (Enterolobium cyclocarpum), and Lamtoro (Leucaena leucocephala) and also knowing the chemical content of nutrients in the stool of crickets. This research was conducted in the Laboratory of Intensive Silviculture Faculty of Forestry, Klebengan, Sleman, Yogyakarta. The method used the measurement of growth parameters include the height, diameter, and survival rate at 3 different types of fast growing seedlings in Sengon laut, Sengon buto, and Lamtoro. Measurements were taken once a week during 10 weeks, from October 2013 to January 2014. This research uses a series of CRD with three fertilizer treatments, by comparison of the dirt ground cricket

KAJIAN NILAI BULK DENSITY TANAH PADA AREAL TANAMAN JATI (Tectona grandis), MAHONI (Swietenia mahagoni), dan LEGARAN (Alstonia spectabilis R.Br), PADA LOKASI PETAK UKUR PERMANEN (PUP) HUTAN WANAGAMA I

Forest of Wanagama I is a forest that have many functions in ecology, socialeconomy, education, and others. In education field, forest of Wanagama I is become an education forest that have big role in forestry field. Then need existence of innovations into development and management, one of those that can be used within aid development of Wanagama I forest Gunungkidul is by make permanent measurement partition (PUP) in every partition in the forest of Wanagama I. PUP is make on the different tracks and stands so that can represent reality condition of Wanagama I. One of thing that can be researched on the PUP concern to one of physic land character that is bulk density. This research is aims to know and collect early data relationship of bulk density value on the hardwood plants (Tectona grandis. L.f) partition 6 and 7, Mahogany (Swietenia mahagony jacg) partition 16, and Legaran (Alstonia spectabilis) partition 15 at forest of Wanagama I. Research method that is used is 2 those are in the field and in the laboratory. 1) Field research is high and diameter measurement of three types of stands above and 2) laboratory research is done by drying sample in temperature 105o C until reaching constant weight and then calculated using formula BD=(W2-W3)/Volume (gr/m3) to get bulk density value on the land sample 4 locations above. From the result research is known that high and diameter of the four stands are about 0,5-4 m to the high and diameter is about 0,5 � 4,5 cm. it shows plants are still pale so those are very potential to be use as PUP area because the growth can be observed continually every year. Average value of bulk density in the whole location shows high values those are for hardwood plant (partition 7 and 6), Mahagony and Legaran in orderly 1,54 gr/cm3, 1,61 gr/cm3, 1,50 gr/cm3, and 1,62 gr/cm3. The matter shows high land density thus on the research location need to be done land management by mechanic instrument and add organic material to fix land density so that plant�s growth will be better