“Influence of media, VAM (Vesicular Arbuscular Mycorrhizae) and supplementary nutrients on growth of Khasi Mandarin seedlings (Citrus reticulata Blanco)”.
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Date
2022-09-30
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College of Horticulture and Forestry, Central Agricultural University, Pasighat -791102
Abstract
the present investigation entitled, “Influence of media, VAM and supplementary nutrients on growth of Khasi mandarin seedlings (Citrus reticulata Blanco) was conducted at Citrus Fruit Nursery, Department of Fruit Science, College of Horticulture and Forestry, CAU, Pasighat, Arunachal Pradesh during the year 2021-22. The experiment was planned in two factorial CRD and replicated thrice. The experiment consisted of two factors viz. media with 3 levels, M0: soil, M1: soil + vermicompost (4:1), M2: soil + vermicompost (2:1) and VAM species with four levels V0: control, V1: VAM 1 (Acaulospora laevis), V2: VAM 2 (Glomus bhagyraj), V3: VAM 3 (Glomus mosseae). NPK 1% @ 19:19:19 was sprayed among all treatments in common.
The findings of this research showed that the media of M2 (soil + vermicompost (2:1) was found to be better with respect to vegetative growth parameters viz. plant height, number of leaves a, stem diameter, physiological growth parameter of fresh and dry weight of leaves, shoot and stem, length of the longest root, number of primary roots), root volume. Biochemical parameters like chlorophyll “a”, “b” and total chlorophyll, leaf carbohydrate, leaf protein, microbiological parameters like number of chlamydospores at initial and end of the experiment (682.83 and 690.17), percent root colonization (71.05 %),
The results of this study revealed that the amongst the three VAM species, V3 (Glomus mosseae) was found to be more effective in influencing the seedlings w.r.t vegetative growth parameters.
Khasi mandarin seedlings responded significantly towards the combination effect of media M2 (soil + vermicompost (2:1) with V3 (Glomus mosseae)w.r.t vegetative growth parameter such as fresh and dry weight of leaves, shoot and stem, length of the longest root, number of primary roots, root volume.Microbiology parameter like number of chlamydospores at initial and end of the experiment (935.67 and 942.33), percent root colonization (96.00 %), relative mycorrhizal dependency of plant height (68.05 %, number of leaves (47.20%), stem diameter (40.48 %), fresh and dry weight of leaves (68.01 and 64.67 %), shoot (73.48 and 75.19 %) and stem (81.06 and 84.54 %), length of the longest root (50.15 %), number of primary roots (66.67 %), root volume (6973.00 mm3). physio chemical properties of soil pH and EC (5.97 and 0.56 dsm-1), soil fertility status of available nitrogen, phosphorus and potassium (294.78 kg/ha, 40.93 kg/ha and 227.73 kg/ha, respectively), organic carbon content in soil (2.95 %), Percentage of leaf nitrogen, phosphorus and potassium nutrients content in leaf (4.32 %, 0.51 % and 2.04 %, respectively). Nutrient content in vermicompost of percentage of nitrogen, phosphorus and potassium (1.75 %, 0.88 % and 0.29 %, respectively) at the initial of the experiment.
Khasi mandarin seedlings were found to perform significantly better when transplanted in media consisting of soil and vermicompost at 2:1 ratio inoculated with Glomus
Description
Khasi mandarin is commercially the most important citrus fruit in North Eastern Region of India. While significance of vegetative propagation had been established; its adoption by the nurserymen and preference by growers in this region is limited. Still, they are continuing plantation of seedlings. Prevalence of nucellar seedlings in Khasi Mandarin can be effectively explored in this aspect. Enhancing the growth of seedlings becomes essential in Khasi mandarin.
Therefore, the present investigation entitled, “Influence of media, VAM and supplementary nutrients on growth of Khasi mandarin seedlings (Citrus reticulata Blanco) was conducted at Citrus Fruit Nursery, Department of Fruit Science, College of Horticulture and Forestry, CAU, Pasighat, Arunachal Pradesh during the year 2021-22. The experiment was planned in two factorial CRD and replicated thrice. The experiment consisted of two factors viz. media with 3 levels, M0: soil, M1: soil + vermicompost (4:1), M2: soil + vermicompost (2:1) and VAM species with four levels V0: control, V1: VAM 1 (Acaulospora laevis), V2: VAM 2 (Glomus bhagyraj), V3: VAM 3 (Glomus mosseae). NPK 1% @ 19:19:19 was sprayed among all treatments in common.