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All Journal Jurnal Produksi Tanaman Jurnal Agrotek Tropika Journal of Tropical Crop Science
Indarwati, Lisa Dwifani
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Agriculture, Biological Sciences & Forestry

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PHYSIOLOGICAL RESPONSES OF SHALLOT (Allium cepa L. Aggregatum group) IN DROUGHT STRESS WITH THE APPLICATION OF SALICYLIC ACID AND BIOSILICA Indarwati, Lisa Dwifani; Sulistyaningsih, Endang; Zuhdi, AH. Maftuh Hafidh
Jurnal Agrotek Tropika Vol. 13 No. 1 (2025): JURNAL AGROTEK TROPIKA VOL 13, FEBRUARI 2025
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jat.v13i1.7922

Abstract

The purpose of this study was to determine the physiological responses of shallots in drought stress with the application of salicylic acid and biosilica. The research was conducted in the Tri Dharma experimental station plastic house, Faculty of Agriculture, Universitas Gadjah Mada, located in Banguntapan District, Bantul, Yogyakarta, from November 2019 to May 2020. A factorial 4x2 experiment was laid out in a randomized complete block design with four blocks. The treatments were a four-level exogenous induction, i.e., 0,5mM SA, 6mM Si, a combination of 0,5 SA and 6mM Si, and control/0 exogenous induction by a two-level irrigation interval, i.e., one-day interval and three-day interval. The variables observed included leaf greenness, leaf and root surface area, plant fresh and dry weight, endogenous SA, POD enzyme activity, H2O2 levels, and yield components. The data were statistically analyzed using the analysis of variance with the honestly significant difference value, calculated as Tukey's statistic at the 5% level. The research results showed that a three-day irrigation interval did not significantly affect the growth and yield of the Bima Brebes shallot cultivar. Application of a combination of 0,5 mM SA and 6 mM Si can increase plant tolerance by accumulating higher levels of endogenous SA so that plants can maintain leaf greenness better than controls, increase bulb dry weight, harvest index, and shallot productivity, and significantly increase bulb diameter in three day-irrigation intervals.
Pengaruh El Nino dan La Nina Terhadap Produktivitas dan Rendemen Tebu (Saccharum officinarum L.) (Studi Kasus di Kecamatan Pitu Kabupaten Ngawi) Indarwati, Lisa Dwifani; Fajriani, Sisca; Soelistyono, Roedy
Produksi Tanaman Vol. 6 No. 10 (2018)
Publisher : Jurusan Budidaya Pertanian Fakultas Pertanian Universitas Brawijaya

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Anomali iklim yang sering terjadi pada akhir-akhir ini merupakan salah satu permasalahan penting dalam pembangunan pertanian, misalnya fenomena El Nino dan La Nina. Dampak El Nino di Indonesia menyebabkan penurunan curah hujan dibawah curah hujan normal sedangkan La Nina menyebabkan  peningkatan curah hujan diatas curah hujan normal. El Nino mengakibatkan kekeringan pada fase vegetatif tebu dengan gejala daun menggulung untuk mengurangi transpirasi, penurunan luas daun untuk mengurangi serapan sinar matahari dan penurunan kadar klorofil, sedangkan akibat La Nina yang terjadi pada fase generatif tebu menjadikan pertumbuhan tebu terus berlangsung dan tidak ada kesempatan dalam proses pemasakan sehingga rendemen menjadi rendah. Penelitian dilaksanakan di Kecamatan Pitu Kabupaten Ngawi mulai bulan Maret sampai bulan Mei 2017 dengan metode pendekatan kuantitatif berdasarkan survey menggunakan data primer dan data sekunder. Data primer diperoleh secara langsung berdasarkan wawancara dengan petani tebu Kecamatan Pitu yang dipilih secara acak dan diambil sebanyak 10% dari total populasi petani tebu. Data sekunder berupa data produktivitas dan rendemen tebu serta data unsur-unsur iklim (curah hujan, hari hujan, suhu, dan lama penyinaran). Hasil yang didapatkan menunjukkan fenomena El Nino dan La Nina terbukti memberikan pengaruh terhadap produktivitas tebu di Kecamatan Pitu Kabupaten Ngawi, namun tidak memberikan pengaruh terhadap rendemen tebu. Unsur-unsur iklim secara simultan mempengaruhi produkstivitas tebu sebesar 64%. Unsur iklim hari hujan dan lama penyinaran berpengaruh secara parsial terhadap produktivitas tebu, namun unsur iklim curah hujan dan suhu tidak berpengaruh secara parsial terhadap produktivitas tebu.
Analysis of Potential Cropping Seasons of Cayenne Pepper (Capsicum frustescens L.) Based on Water Balance in Alfisol Dryland, Tuban Regency, East Java, Indonesia Zuhdi, AH. Maftuh Hafidh; Indarwati, Lisa Dwifani
Journal of Tropical Crop Science Vol. 11 No. 01 (2024): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.11.01.33-38

Abstract

Dryland agriculture is crucial for understanding how to effectively manage land water for the crops. Water balance analysis plays a pivotal role in comprehending the hydrological cycle and water availability for crop production. The Tuban Regency is one of the fifth largest cayenne pepper-producing areas in East Java, Indonesia, particularly in Grabagan and Bancar Districts. However, for sustainable growth, it is imperative to extend cultivation to other sub-districts within Tuban Regency. In the cultivation of cayenne pepper, attention to soil water availability is important due to its susceptibility to drought, directly impacting vegetative growth and overall plant production. This research aims to establish a planting pattern for cayenne pepper based on water balance analysis in Alfisol drylands within Montong, Kerek, and Singgahan Districts of Tuban Regency. The study, conducted from July to September 2023, employed Thornthwaite and Mather water balance analysis,drought index assessment, and day without rain analysis. The research findings reveal variations inwater balance conditions within the study areas, with Montong and Kerek Districts experiencing a land water surplus for three months and a nine-month deficit. Singgahan District, on the other hand, encountered a surplus for four months and a deficit for eight months. The drought index indicates a high level, peaking in September for Montong (87%), Kerek (91%), and Singgahan (87%) Districts. Cayenne pepper plants exhibit the potential for annual cultivation in Alfisol drylands of Montong, Kerek, and Singgahan Districts, with a growing duration of six months. The optimal planting window spans from December to May, followed by potentially a second planting in June and July for crops with a minimum available water value exceeding 19% or those with a shorter harvest life. From August to November, the land lies fallow due to a soil water availability that is close to 0% and a 27% risk of days without rain in the extreme drought category, rendering the soil unsuitable for growing crops.
Co-Authors AH. Maftuh Hafidh Zuhdi Endang Sulistyaningsih Roedy Soelistyono Sisca Fajriani