Open Access Original Research Article

Growth and Yield of Onion as Influenced by Sulphur and Boron with Mulch Materials

Sajeed Hasan Bappy, Khaleda Khatun, Tahmina Mostarin, Mutasim Fuad Shuvo, Mst. Umme Habiba, Most. Jakia Siddika, Md. Murshedul Alam, Md. Monir Hossain

Asian Plant Research Journal, Page 1-14
DOI: 10.9734/aprj/2021/v7i330154

A field experiment was conducted at the research farm of Sher-e-Bangla Agricultural University, Dhaka. During the period from October, 2018 to March, 2019 to find out the growth and yield of onion as influenced by Sulphur and Boron with mulch materials. The experiment consisted of two factors: Factor A: Four doses of Sulphurand Boron fertilizer viz. F0 = S0kgB0kg/ha (Control), F1 = S20kgB1kg/ha, F2 = S40kgB2kg/ha, F3 = S60kgB3kg/ha and Factor B: Four types of mulch viz. M0 = No mulch and no irrigation, M1 = Black polythene, M2 = Water hyacinth and M3 = Rice straw. There were 16 treatment combinations and experiment was setup in a Randomized Complete Block Design (RCBD) with three replications. In case of Sulphur and Boron treatments at 60 days after transplanting (DAT), the highest plant height 53.38 cm, maximum leaf number 10.48, highest bulb length 4.83 cm,, maximum neck diameter (1.31 cm), highest dry matter content (15.98%), dry matter content of leaf (24.74%), single bulb weight (39.93 g), yield per plot (0.80 kg) and yield per hectare (9.98 t) were obtained from F3 treatment. Among the mulch materials,  highest plant height at 60 DAT (52.51 cm), maximum leaf number (10.19), highest bulb length (4.52 cm), highest bulb diameter (5.74 cm), maximum neck diameter (1.26 cm), dry matter content of leaf (23.35%), single bulb weight (39.05 g), yield per plot (0.78 kg) and yield per hectare (9.76 t) were obtained from M1 treatment. In combined effect, the highest plant height at 60 DAT (55.54 cm), maximum leaf number (11.47), longest bulb length (5.51 cm), highest bulb diameter (6.68 cm), maximum diameter of neck (1.42 cm), dry matter content of leaf (27.48%), single bulb weight (42.40 g), yield per plot (0.85 kg) and yield per hectare (11.21 t) were obtained from F3M1 treatment (S60kg/ha + B3kg/ha with black polythene mulch). The highest gross return (Tk. 3, 36, 300/ha), net return (Tk. 1, 88, 934/ha) and benefit cost ration (2.28) was obtained from the treatment combination (F3M1). Accordingly, for high growth, high yield, and economic point of view, F3M1 treatment is recommended in onion cultivation.

Open Access Original Research Article

Evaluation of a Method of Separating Agarwood Absolute from Aquilaria crassna Pulp by Soxhlet and Soaking for Fixative Substance in Blending Fragrance

Le Huy Hai, Le Mai Xuan Truc, Nguyen Quoc Trung

Asian Plant Research Journal, Page 27-35
DOI: 10.9734/aprj/2021/v7i330156

Agarwood resin is a precious material that has been widely used in industry and life. The aim of this study is the evaluation of a method of separating Aquilaria crassna wood pulp with ethanol by Soxhlet and solvent immersion method for fixative substance in blending fragrance. Agarwood pulp of Aquilaria crassna tree is grown in Binh Thuan province, Vietnam. Our research team has extracted the Agarwood absolute F.1 and F.2 from Aquilaria crassna by Soxhlet extraction and soaking method. The fragrance is diluted 10 times by odorless solvent diethyl phthalate (DEP), then use paper and olfactory of the nose to evaluate the aroma. The yield of absolute Agarwood extracted by the method of Soxhlet is 5.56% weight. The yield of Agarwood absolute extracted by the method of soaking is 4.58% weight. Agarwood absolute F.1 is a fixative substance, which is capable of storing fragrance better than Agarwood absolute F.2. The scent of fragrance Fr.F.2 using Agarwood absolute F.2 is more like a natural scent than fragrance Fr.F.1 with fixative F.1. Separating Agarwood absolute F.1 from Aquilaria crassna pulp by Soxhlet provided yield and fixative capabilities higher than separating Agarwood absolute F.2 from Aquilaria crassna pulp by soaking. The scent of fragrance Fr.F.2 using Agarwood absolute F.2 is more like a natural scent than fragrance Fr.F.1 with Agarwood absolute F.1.

Open Access Original Research Article

Leaf Physiological and Water Soluble Carbohydrate Content Responses to Trinexapac-ethyl Application of Sports Turf Grasses Exposed to Water Stress

Mbah H. Agwa, J. P. H Reade, M. Hare

Asian Plant Research Journal, Page 36-49
DOI: 10.9734/aprj/2021/v7i330157

Water stress causes alterations in physiological and metabolic processes in plants and is considered the primary environmental factor affecting the management of sports turf grass species.This glasshouse experiment was conducted to investigate the effect of trinexapac-ethyl (TE) on canopy net photosynthesis (Pn), cell membrane stability (CMS), turf quality (TQ) and water soluble carbohydrate (WSC) accumulation responses of sports turf cultivars [Cv] (100% fescue, Rootzone and Arena sports) subjected to water stress. Commercially obtained sods of turf plants were treated with 2 L/ ha TE and then exposed 7 days after to water stress. The treatments were: (i) water untreated, (ii) water TE-treated, (iii) water stress untreated; and (iv) water stress TE-treated and the experiment was a randomized complete block design with four replicates. Results showed that specifically in Cv. Rootzone, Pn was 50% higher for well water TE treated plants compared to the other treatments during the second and third week of the study. Similarly, at 14 days after application, the effect TE resulted to 35% and 50% reduction in cell membrane leakages respectively in well water and water stressed TE-treated Cv. Rootzone plants and  this was statistically significant (P=0.05) different from the untreated plants. On a scale of 1-9, all turf types recorded TQ rating of ≥8 at the start of the experiment. By the fourth week of the study, it was observed that all water stress untreated plants had mean TQ (5.75) ratings lower than the minimum acceptable TQ (6). WSC content of well-watered TE-untreated plants was maintained below 60 mg/g DW throughout the study regardless of turf type. After 28 day of water stress duration, the WSC contents obtained in water stress TE-treated plants were 41%, 43% and 50% higher for Cv. Rootzone, 100% fescue and Cv. Arena sports, respectively , than in well water untreated plants. Summer preconditioning of plants with TE can be a possible management tool in alleviating the detrimental impacts of water stress in sport turf species.

Open Access Original Research Article

Ethnobotanical Practices among the People of Dagana District, Bhutan

Karma Sherub, Bhagat Suberi, Purna Prasad Chapagai, . Penjor, Kelzang Jurmey, Karma Wangdra, Moni Kumar Neopaney

Asian Plant Research Journal, Page 50-59
DOI: 10.9734/aprj/2021/v7i330158

Medicinal plants are one of the most affordable and accessible method available for the treatment of various ailments and diseases by the local people. In this regards, the study aimed to document the ethno-medicinal knowledge of plants used by the local people of Dagana district of Bhutan. Data were collected between June and November of 2020 using semi-structured interviews from the local people, following snowball sampling.  The study documented 74 medicinal plant species, used for treating 30 different body ailments and diseases. Maximum number of species (14) was used in treating cut/body wounds and commonly used plant parts was leaves (30 species). Current study area was found to be rich in ethno-medicinal knowledge, but equally threatened with declining practices and management of resources. Thus, appropriate conservation of resources and preservation of traditional knowledge is required.

Open Access Review Article

Application of Marker Assisted Selection for Striga Hermonthica Resistance on Sorghum (Sorghum bicolor (L.) Moench

Habtamu Demelash Tamir

Asian Plant Research Journal, Page 15-26
DOI: 10.9734/aprj/2021/v7i330155

Sorghum (Sorghum bicolor L. [Moench]) is a staple food crop for smallholder farmers in arid and semi-arid(ASALs) regions worldwide, feeding over 500 million of the world's most resource-poor. Development of Striga Hermonthica resistant cultivars by conventional breeding is slow and have been hampered by the lack of efficient and reliable screening techniques in breeding programs. Molecular markers that are linked to witchweed resistance can expedite the development of resistant cultivars through the adoption of appropriate marker-assisted selection (MAS) strategies. Marker-assisted selection involves the selection of genotypes carrying a desirable gene(s) via linked markers; through MAS more rapid transfer of traits from donor parents to more elite locally adapted crop cultivars is possible with simple-sequence repeat (SSR) markers which have been initially used to detect polymorphism between the parent cultivars. Although costly to develop relative to some other classes of genetic markers, once developed, analysis by SSR markers is both easy and inexpensive. The highly polymorphic nature (high information content) and other favorable characteristics make them excellent genetic markers for a number of studies including marker-assisted selection and fingerprinting of germplasm collections. In this review, we summarize the molecular markers that are linked to the inheritance trait or low germination stimulant production is one of the recognized mechanisms of witch weed resistance.