ABSTRAK<br />Salah satu faktor yang berpengaruh terhadap viabilitas benih<br />sambiloto (Andrographis paniculata Nees) adalah waktu panen.<br />Berdasarkan permasalahan tersebut kegiatan ini dilakukan dengan tujuan<br />untuk mengetahui pengaruh umur panen terhadap viabilitas benih serta<br />hubungannya dengan produksi terna sambiloto. Percobaan dilakukan di<br />KP. Cimanggu dan Laboratorium, Balai Penelitian Tanaman Obat dan<br />Aromatik, dari Maret 2005 – Maret 2006. Percobaan disusun dalam<br />rancangan acak kelompok (RAK) dengan 10 perlakuan stadia umur<br />panen dan 4 ulangan. Stadia umur panen yang diuji yaitu 18, 21, 22, 23,<br />24, 25, 26, 27, 28, dan 29 hari setelah antesis (HSA). Variabel yang<br />diamati yaitu mutu benih (daya berkecambah benih, kecepatan<br />berkecambah), pertumbuhan tanaman (tinggi tanaman, jumlah cabang),<br />serta produksi terna (bobot basah tanaman, bobot kering daun, dan bobot<br />kering batang). Hasil penelitian menunjukkan bahwa: (1) Umur panen<br />benih berpengaruh terhadap daya berkecambah benih dan kecepatan<br />berkecambah benih sambiloto; daya berkecambah dan kecepatan<br />berkecambah tertinggi didapatkan pada umur panen benih 22 dan 21 HSA<br />(67,00 dan 55,00)%; sedangkan daya berkecambah yang terendah<br />diperoleh pada umur panen 18 HSA (23,50)%, (2) Umur panen benih<br />berpengaruh terhadap tinggi tanaman dan jumlah cabang pada tanaman<br />umur 1 bulan. Tinggi tanaman dan jumlah cabang tertinggi berturut-turut<br />didapatkan pada perlakuan umur panen benih 27 dan 26 HSA (39, 63<br />dan 36,58 cm serta 16,71 dan 16,61 buah); dan (3) Umur panen benih<br />berpengaruh terhadap produksi terna (bobot basah tanaman, bobot kering<br />daun, bobot kering batang) pada umur 3 bulan. Bobot basah tanaman,<br />bobot kering daun, serta bobot kering batang tertinggi didapatkan pada<br />perlakuan umur panen benih 27 HSA (291,25, 28, 27 dan 28,86)g. Bobot<br />basah tanaman, bobot kering daun, serta bobot kering batang terendah<br />didapatkan pada perlakuan 18 HSA (217,09, 22,10 dan 20,24)g. Umur<br />panen benih tidak berpengaruh terhadap jumlah cabang pada umur 3<br />bulan.<br />Kata kunci : Sambiloto, Andrographis paniculata Nees, umur panen,<br />viabilitas, produksi, Jawa Barat<br />ABSTRACT<br />The influence of harvesting time on the seed viability and<br />the relationship with herb yield of king bitter<br />(Andrographis paniculata Nees)<br />One of the main factors influencing the viability of king bitter<br />(Andrographis paniculata Nees) is appropriate harvesting time. Based on<br />this problem a research was conducted to study the relationship between<br />seed maturity and seed viability, and herb yield of king bitter. The research<br />was conducted at Cimanggu Experimental Station and in the laboratory of<br />Indonesian Medicinal and Aromatic Crops Research Institute (IMACRI)<br />from March 2005 to March 2006. The experiment was arranged in a<br />randomized block design with 10 seed maturity stages and 4 replications.<br />Maturity seed tested was 18, 21, 22, 23, 24, 25, 26, 27, 28 and 29 days<br />after anthesis. The observations were made on seed quality (percentage of<br />seed germination, and rate of seed germination), plant growth (plant<br />height, number of branches) and herb yield (fresh herb weight, leaf dry<br />weight, and stem dry weight). The results of experiment indicated that (1)<br />seed maturity affected seed germination, and rate of seed germination of<br />king bitter; the highest seed germination and germination rate were<br />achieved by seeds harvested at 21 and 22 days after anthesis, (2) stage of<br />seed harvesting affected on the plant height and number of branches at 1<br />month after planting. The highest plant height and number of branches<br />were found on the treatments of seeds harvested at 26 and 27 days after<br />anthesis, they were 39.63 and 36.58 cm and 16.71 and 16.61; (3) seed<br />maturity also affected herb production, such as wet weight of plants, dry<br />weight of leaf and dry weight of steam at 3 moths after planting. Wet<br />weight of plant, dry weight of leaf and dry weight of stem were achieved<br />at the treatments of seeds harvested at 27 days after anthesis, they were<br />291.25, 28.27 and 28.86 g. The lowest of wet of plant weight, dry weight<br />of leaf and dry weight of stem were found on the seeds harvested at 18<br />days after anthesis. They were 217.09, 22.10 and 20.24 g. Moreover, the<br />stage of harvesting did not influence the number of branches at 3 months<br />after planting.<br />Key words: King bitter, Andrographis paniculata Nees, seed maturity,<br />viability, production, West Java
Functional ecology of the biological soil crust in semiarid SE Spain: sun and shade populations of Diploschistes diacapsis (Ach.) Lumbsch.