Effect of foliar application of urea and planofix on the foliage yield of coriander.
Note: The authorship was changed on 23.02.2016 FROM Abdur Rakib, M. Kamruzzaman 1 *, Soyema Khatun 1 and M. Moniruzzaman 2 TO Abdur Rakib 1 *, M. Moniruzzaman 2 , M. Hasan 3 and M.M. Rahman 3 . The authorship is changed due to request of the principal author to add two co-authors of his major professor and advisory committee member of postgraduate study and two co-authors are excluded from the authorship and acknowledged them for their contribution in the manuscript. ______________________________________________________________ Abstract: An experiment on coriander ( Coriandrum sativum L. ) was conducted at the experimental field of Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during November 2012 to April 2013 to find out the suitable foliar doses and application frequency of urea and planofix (NAA). The experiment was laid out in factorial randomized complete block design with three replications. The treatment consisted of six foliar dozes viz. T 1 (Tap water as control), T 2 (0.10 % urea), T 3 (0.25 % urea), T 4 (0.40 % urea), T 5 (5 ppm planofix) and T 6 (10 ppm planofix) and three application frequencies viz. F 1 [20 days after sowing (20 DAS)], F 2 (30 DAS) and F 3 (20 and 30 DAS). Maximum foliage yield (6.94 t/ha) was recorded in 10 ppm planofix coupled with it’s twice application at 20 and 30 DAS which was closely followed the foliage yield (6.33 t/ha) by 5 ppm planofix with the same application frequency. The foliage yield was increased with the increase in urea concentration. The highest foliage yield (5.37 t/ha) was also recorded from twice application of urea and planofix at 20 and 30 DAS, respectively. Planofix 10 ppm with its twice application at 20 and 30 DAS gave the highest benefit-cost of ration 2.51. Int. J. Agril. Res. Innov. & Tech. 5 (1): 40-44, June, 2015
The Impact of Plant Growth Regulators on Growth and Biochemical Constituents of Coriander (Coriandrum sativum L.)
ABSTRACT Coriander (Coriandrum sativum L.) is primarily grown for seed and seed oil. The fresh green herb, called cilantro or Chinese parsley, is also very popular all over the world for the usefulness in soups, salads, dressing of vegetables, seasoning, and chutney. Besides, green herbs are rich in vitamin C, A, and B2. In view of the usefulness of green herbs in a number of kitchen preparations and human nutrition, an experiment was carried out for 2 consecutive years (from November to April, 2000–2001, and 2001–2002) at a horticulture farm, Department of Horticulture, Rajasthan College of Horticulture, Udaipur, India to evaluate the effect of plant growth regulators (IAA, NAA and GA3 each at 10, 20, and 50 ppm concentration) and the method of their application (pre-plant soaking, spraying 20 days after sowing (DAS) and pre-plant soaking + spraying 20 DAS) on herb growth, yield, and biochemical constituents (carotenoid and chlorophyll content) of coriander. The results (average of 2 years' data on pooled basis) showed that application of treatment was significant over control in all the observations recorded. GA3 50 ppm applied through pre-plant soaking + spraying 20 DAS recorded maximum plant height (23.85 cm) and number of green leaves per plant (22.03), while fresh weight of leaves per plant (5.58 g) and carotenoid content (1.075 μg/g) were with NAA 20 ppm applied through pre-plant soaking + spraying 20 DAS mode. Higher concentration of NAA (50 ppm) when applied through pre-plant soaking + spraying 20 DAS mode resulted in maximum total chlorophyll content (16.43 μg/g). The results obtained from the investigation showed that a significant improvement by plant growth regulators and their method of application in herb growth, yield, and quality characteristics occurred. This suggested that GA3 at 50 ppm applied through pre-plant soaking + spraying 20 DAS significantly improve the vegetative growth of coriander herb while NAA at 50 ppm improved the quality of the coriander herb.
RESPONSE AND RECOVERY OF CORIANDRUM SATIVUM L. VARIETY INDOORI EXPOSED TO SOIL MOISTURE STRESS
Influence of soil moisture stress was investigated in Coriandrum sativum L. var. Indoori subjected to soil moisture stress (SMS) for four and eight days. The study revealed a decline in relative water content (RWC) with an increase in leaf water potential (LWP) upto 2.1 MPa. A decrease in total chlorophylls upto 34% and a minor reduction in chlorophyll stability index (CSI) was visible. Significant accumulation of free proline, free amino acids, ascorbic acid and total flavanoids was evident in plants facing eight days SMS. Lipid peroxidation and superoxide dismutase activity enhanced, but proline oxidase activity declined due to water deficit. Upon rewatering, RWC increased and amount of proline and ascorbic acid decreased. Lipid peroxidation decreased and enzyme activities recovered upon rewatering. The variety is susceptible to SMS but can be recovered from stress within five days after rewatering. Accumulation of antioxidants such as ascorbic acid and flavanoids may help the plant to face oxidative stress.