A number of plant species have adapted well in the soil conditions of the mining area and were capable to accumulate nickel in the aerial part of plants. The differences of tolerance and bioaccumulation on Ni contaminated soil on five plant species obtained from Ni post-mining land were in vestigated in pot experiment. The results showed that Sarcotheca celebica had a high tolerance (root tolerance index of 128.45% and shoot tolerance index of 219.78%) and its capability to accumulate Ni in shoot (Translocation Factor value 8.67) was higher than that in the root. Tephrosia sp., Mimosa pigra and Celtis occidentalis were tolerance species that accumulated more Ni in the roots than in the shoots. Melastoma malabathricum was able to accumulate Ni the shoot in limited quantities.
Black pepper is a high nutrient-demanding crop; however, high application rates of the chemical fertilizer may give a negative impact on the environment and human health. Coapplication of the chemical fertilizer with biological fertilizers or biological agents is very important to support growth and high yield. This field experiment was carried out to study the effect of Trichoderma harzianum and foliar fertilization on the vegetative growth of black pepper. The study was conducted for 4 months. The research method was arranged in a factorial based on randomized block design (RBD). The first factor was the application of Trichoderma (50 g, 75 g, and 100 g per plant), and the second one was foliar fertilizers (1.0%, 1.5%, 2.0%, and without foliar fertilizer as the control). The treatments were repeated three times. The results showed that the application of both Trichoderma and foliar fertilizer affected the rate of shoot growth, the number of leaves, and the emergence time on black pepper seedlings under the nursery conditions. The application of 50 g/plant of Trichoderma and 1.5% of the foliar fertilizer resulted in 26% longer shoot length and 54% more leaves and accelerated the appearance of shoots 10 days earlier compared to without Trichoderma and the foliar fertilizer.
The objectives of the research were to find out type of organic fertilizer and urea doses to improve the yield of celery. The experiment was arranged using Randomized Block Design with factorial design.The first factor were cow manure, compost and chicken manure and the second factor were urea dosage 240 kg/ha, 270 kg/ha and 300 kg/ha.The results showed that organic fertilizer treatment in the form of chicken manure and urea 300 kg/ha resulted in plant height, leaf number, number of tillers, root volume and wet weight in celery were highst. The highest number of tillers was 6.27 plants and wet weight 14.69 g per plant.
Black pepper is a high nutrient demanding crop. However, over utilize of chemist fertilizer may give a negative impact to the environment and human health. Therefore, fertilizer use and management is crucial infortance to sustain growth and high yield. This Field experiment is carried out to study the effect of Tricoderma harzianum and liquid organic fertilizers on vegetatif growth of Black Pepper. The research method is design by Randomized Block Design (RBD) Factorial two factors. Parameters observed are the time of emergence of tendrils, spiraling length, number of tendrils, number of leaves and number of productive branches. The observed data obtained were statistically analyzed using analysis of variance and further tested by Tukey’s HSD Test at 5%. The result of this research is expected to have a better effect of Tricoderma and one of the liquid organic fertilizers on vegetatif growth of black pepper in the field. Therefore, Biological Agent and organic fertilizer can be an alternative way to substitute NPK fertilizer that can reduce the chemist fertilizer utilization. In conclusion, to achieve high growth performance, organic fertilizer alone is insuffcient whilst integrated fertilization gave a signifcant increase in yield and growth of black pepper.
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