<p><strong><em>Abstraksi : </em></strong><em>Pertumbuhan penduduk sebagai pemicu perubahan tataguna lahan memberikan dampak langsung terhadap peningkatan aliran permukaan dan menurunnya peresapan air ke dalam tanah, yang berakibat terjadinya banjir dan kekurangan air tanah. Sumur resapan salah satu alat untuk menambah peresapan air dan sekaligus menurunkan debit banjir. Pendekatan persamaan debit sumur resapan pada umumnya dilakukan secara matematis, sedangkan secara empiris masih sangat kurang.Tekstur tanah diinvestigasi dengan grain size dan hidrometer. Klasifikasi tanah dengan menggunakan segitiga tekstur tanah menurut USDA. Dengan menggunakan sumur dinding rapat diameter 50 cm, dan tinggi 90 cm dilakukan pengujian debit resapan sumur sebanyak 6 kali dengan periode waktu awal 0 jam (tes-1), 3 jam (tes-2), 18 jam (tes-3), 24 jam (tes-4), 42 jam (tes-5), dan 24 jam (tes-6) dengan terus menerus sumur resapan diisi air tanpa terputus. Pengukuran debit resapan dilakukan dari kedalaman 85 cm, setiap penurunan 5 cm sampai kedalaman 10 cm. Diterimanya sebuah persamaan regressi dengan melihat koefisien korelasi (R<sup>2</sup>)mendekati 1.</em></p><p><em>Hasil penelitian debit sumur resapan dengan diameter 0,50 meter untuk tekstur tanah silt, mengikuti persamaan parabola Qs = 0,000001 . H <sup>4,487</sup>. Nilai R<sup>2</sup> untuk persamaan ini adalah 0,984. Debit resapan sumur resapan akan menurun semakin lama peresapan berlangsung. Tanah silt belum mencapai kondisi jenuh dalam waktu peresapan selama 24 jam. Diharapkan penelitian ini dapat bermanfaat dalam pengembangan ilmu pengetahuan khususnya bidang sumber daya air yang berhubungan dengan permasalahan debit resap sumur resapan. Penelitian ini masih sangat awal dalam menyimpulkan hubungan debit resapan dengan kedalaman air dan masih perlu dikembangkan dengan variasi jenis tanah, diameter dan jenis sumur resapan. </em></p><p> </p><p><strong><em>Abstract:</em></strong><em> Population growth as a driver of land-use change has a direct impact on rising surface flows and decreasing infiltration into the soil, resulting in flooding and water shortages. The absorption well is one of the tools to increase water infiltration and simultaneously decrease the flood discharge. The approach of the discharge well equation is generally done mathematically, while the empirical is still very less. The soil texture is investigated by grain size and hydrometer. Soil classification using a soil texture triangle according to USDA. Using well wall wells of diameter 50 cm, and height 90 cm, a well discharge well 6 times (0 test-1), 3 hours (test-2), 18 hours (test-3), 24 hours hour (4th test), 42 hours (test-5), and 24 hours (test-6) with continuous absorption wells filled with water without interruption. The measurement of absorption discharge is done from a depth of 85 cm, each decrease 5 cm to a depth of 10 cm. Acceptance of a regression equation by looking at the correlation coefficient (R2) approaches 1.</em></p><em>The results of discharge well discharge research with diameter 0.50 meters for silt soil texture, following parabolic equation Qs = 0,000001. H 4,487. The value of R2 for this equation is 0.984. The absorption well discharge will decrease the longer the infiltration takes place. The silt soil has not reached saturation condition within 24 hours of impregnation. It is expected that this research can be useful in the development of science, especially the field of water resources related to the problems of absorption wells disposal. This research is still very early in concluding the relationship of absorption discharge with water depth and still need to be developed with variation of soil type, diameter and type of absorption well</em>
Pembudidayaan kacang panjang di provinsi Bengkulu masih terpusat di wilayah dataran tinggi. Perlu dikaji peluang peningkatan produksi kacang panjang di dataran rendah Bengkulu dengan cara merakit varietas unggul untuk menghasilkan varietas yang berdaya hasil tinggi dan beradaptasi baik pada ekosistem dataran rendah. Tahapan awal dalam perakitan varietas kacang panjang adalah mengidentifikasi karakteristik dari koleksi plasma nutfah sebagai informasi awal untuk pengembangan tetua persilangan kacang panjang. Penelitian ini bertujuan untuk mengkarakterisasi 14 genotipe kacang panjang yang ditanam di dataran rendah Bengkulu. Penelitian dilakukan di Kebun Percobaan Kelurahan Medan Baru, Kecamatan Muara Bangkahulu Provinsi Bengkulu dengan ketinggian 10 m dpl pada bulan Juli sampai Oktober 2020. Penelitian disusun dalam rancangan acak kelompok lengkap dengan 3 ulangan. Hasil penelitian menunjukkan bahwa genotipe KPG4, KPG8, KPG12, KPG13, dan KPG14 memiliki umur genjah, panjang polong, bobot per polong, dan bobot polong per tanaman yang tinggi serta memiliki warna hijau dan tekstur yang renyah. Berdasarkan karakter kuantitatif analisis gerombol 14 genotipe kacang panjang menghasilkan 5 kelompok dan analisis komponen utama menghasilkan 3 komponen utama dengan keragaman kumulatif 82.54%. Kata kunci: dendogram, koefisien keragaman, panjang polong, plasma nutfah, seleksi
High production of long beans is closely related to the variety used and growing environmental conditions. The selection process to obtain varieties with high yields is caused by the correlation between yield characters and yield components. The purpose of this research was to obtain information about the correlation between the growth and yield characters of long beans through correlation analysis. The research was conducted from July to September at the former rice fields of Muara Bangkahulu district and using local long bean genotypes. The experiment design used was completely randomized block design with three replications. Correlation analysis was performed on the character of leaf length, leaf width, harvesting age, pod length, pod diameter, weight per pod, number of pods per plant and pod weight per plant. The results showed that the leaf width character had a significant positive correlation with the pod diameter character. The characters of pod length, weight per pod and number of pods per plant had a significant positive correlation with the yield characters of pod weight per plant. The characters of pod length, weight per pod and number of pods per plant long bean genotypes can be used as parameters for the criteria selection.
[GROWTH AND YIELDS OF SORGHUM VARIETIES TREATED WITH VARIOUS DOSES OF NPK FERTILIZER IN COASTAL LAND]. Sorghum has a potential to be developed in marginal land in coastal area. Drought stress and low availability of utrients in the coastal area are the main problems in growing sorghum. Introducing the drought tolerance variety is one solution to overcome the drought stress in coastal land in order to improve sorghum yields. In addition, the treatment of NPK fertilizer is needed to fulfill the nutrients requirements for growth and yields. This research aims to determine the best sorghum variety and an appropriate dose of NPK fertilizer for the growing sorghum in coastal land. Field experiment was conducted at the coastal area in Bengkulu City from August until November 2021. The experiment was arranged in Randomized Completely Blok Design with two factors. That were sorghum varieties (Numbu, Super 2 and Kawali) and NPK fertilizer doses (150 kg/ha, 300 kg/ha and 450 kg/ha). The results showed that the interaction between sorghum variety and NPK fertilizer dose were not significant on the growth and sorghum yields. Numbu varieties produced the highest panicle weight per plant of 69.42 gram. The research concluded that Numbu variety showed the best growth and yields compare two other varieties. The maximum growth and yield of sorghum in coastal land were observed at NPK 450 kg/ha dose.
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