Impact of Intercropping on Growth and Productivity of Muskdana ( Abelmoschus Moschatus Medic .) Under Acacia Mangium Based Multitier Agro Forestry system

An experiment was conducted to study the impact of intercropping on growth and productivity of Muskdana (Abelmoschus moschatus medic.) under Acacia mangium based multitier Agro forestry system was carried out at Research Farm, Department of Forestry, IGAU, Raipur (C.G.). The design followed was randomized block design with three replications. The observations regarding morphological growth characters viz., plant height, number of leaves and collar diameter. Yield attributes viz., no of capsules plant -1 , no. of seed capsules -1 , seed test weight, seed yield plot -1 , seed yield hectare -1 and oil yield hectare -1 were tabulated and analyzed statistically using randomized block design. The results revealed that the morphological characters of Muskdana viz., plant height, number of leaves and collar diameter were recorded maximum in vermin compost 100% (T 2 ) treatment. Farther the highest Number of capsules/plant (22.37 No.), Number of seed/capsules (110.33 No.), Seed test weight (1.78 gram), seed yield (10.04 q/ha) and oil yield (1.16 kg/ha) was recorded in T2 treatment 100% Vermi compost @ 10 Ton/ha was applied which is superior value among other treatments. However, the minimum average plant height (42.57cm), was observed in T3 (42.57cm) 100% Mahua cake the lowest Number of capsules/plant (15.74 No.), Number of seed/capsules (99.67 No.) and seed yield (8.30 q/ha) was recorded in treatment (T 3 ) 100% Mahua cake this may be some allopathic effect.


Introduction
Agro forestry is an activity that combines production on the same plot of land, from annual agricultural activities (such as crops and pasture) and delayed long-term production by trees (for example timber and services). This is obtained either by planting trees on agricultural land or by cropping (for example after thinning) on forested land. A large number of people in developing countries have traditionally depended on products derived from plants, especially from forest for domestic and commercial uses. About 12.5% of the 422,000 plant species demarcated worldwide are reported to have medicinal value; but only a few hundred are known to be cultivation with dwindling supplies from natural sources and increasing global demand, the MAPs will need to be cultivated to ensure their regular supply as well as cultivation conservation.
As world population increases, the need for more productive and sustainable use of the land becomes more urgent. According to the United Nations, more than 7 billion people populated the Earth in 2011 and this number is expected to go up to 9.3 billion by the mid-century. To meet the demand for food by 2050, production will have to increase by over 60%. These figures, coupled with current problems born out of past and existing nonsustainable land use practices, provide the case for changing the way we manage lands and our production of agricultural and tree goods. Thanks to its multifunctional properties, Agro forestry is part of the solution to addressing these issues, whether they are environmental, economic or social.
in the same field at the same time is called multi-tire cropping. Other names of multistoried cropping or multi-layer cropping. Growing plants of different height in the same field at the same time is termed as multistoried cropping. The objective of this system of cropping is to utilize the vertical space more effectively. In this system, the tallest components have foliage of strong light and high evaporative demand and shorter components with foliage requiring shade and or relatively high humidity.
The experiment site multitier plantation of Acacia mangium, Emblica officinalis and Murraya koenigii in research form of IGKV Raipur during 2003. Acacia mangium is in the family Leguminosae, sub-family Mimosoideae. It has rapid early growth, and can attain a height of 30 meters and a diameter of over 60 centimeters [1]. It is an important multipurpose and nitrogen fixing tree species for low lands and one of major fast growing species used in plantation. A. mangium has increasingly important role in efforts to sustainable supply of tree products viz., fuel wood, timber, poles etc., while reducing the pressure on natural ecosystem. It grows well under low productivity land [2]. Aonla (Emblica officinalis) belonging to the family Euphorbiaceae. It is a small or middle sized deciduous, quite fast growing tree. However, in initial 3 to 4 years sufficient space is available which could be advantageously used for raising intercrops.
The curry leaves tree (Murraya koenigii) is a tropical to sub-tropical tree in the family Rutaceae, which is native to India and Sri Lanka. Its leaves are used in many dishes in India, Sri Lanka, and neighboring countries. Curry leaves or 'curry patte' (Hindi) are derived from a handsome, aromatic and more or less deciduous shrub or tree growing wild or planted all over India. The Muskdana (Abelmoschus moschatus Medic.), (Syn. Hibiscus abelmoschus L.), belongs to the family Malvaceae. In Hindi, it is popularly known as muskdana, kasturi bhendi (kasturi = musk; bhendi = lady's finger). In other Indian languages it is known as gukhia korai (Assamese), kasturi bhenda (Telgu), kattukasturi (Malylam), varttilai kasturi (Tamil), lalkasturika (Sanskrit). In India, roots, leaves (rarely), seeds and oil of ambrette are considered valuable traditional medicines. The oil extracted from this crop has a great national and international demand. This increasing demand of ambrette has motivated the farmers to cultivate this important medicinal crop in fairly large areas. With this background in view, the present investigation was undertaken to study the Impact of Intercropping on Growth and Productivity of Muskdana (Abelmoschus Moschatus Medic.) Under Acacia Mangium Based Multitier Agro forestry System.

Materials and Methods
The experiment was conducted on instructional farm of Department of forestry, IGKV Raipur site is situated in the South-Eastern part of Chhattisgarh. It lies at 21º.76'N latitude and 81º.36'E which longitude having an altitude of 295m. Above mean sea level. The climate of the study area is dry sub-humid tropical with an average rainfall of 1250 mm. Most of the rainfall (90%) is received during monsoon season from mid June to mid September. The average number of rainy days varies from 65 to 79. The meteorological data ranges from experiment time in maximum temperature 30.70C and minimum temp. 24.960C, relative humidity 84.6%, sun shine 7.6 hours and the rainfall 5.6 mm was recorded in sowing time of seed on July month and the harvesting time temperature and sun shine was increases. Maximum temperature 41.750C and min. temp. 25.05, relative humidity 39.75%, sun shine 9.3 hours recorded in month of April.
The black clayey soil of experimental field belongs to the order Vertisols and it is locally known as Kanhar. This Kanhar soil are characterized by fine texture, sticky nature, angular blocky structure, low to medium Nitrogen, high Potassium and low to medium Phosphorus with low Organic matter. The soil of experimental area is very rich in organic carbon and other nutrient because of the addition of litter in the soil every year. The experiment was laid out in a randomized block design (RBD) with eight treatments and three replications. Muskdana was sown as intercrop under tree as well as sole crop (without tree). The different combinations of organic manure and fertilizers were applied prior to planting and thoroughly mixed with the soil in a year with single splits under Multitier Acacia mangium based Agro forestry system. Plot size 2.5 x 5 m were demarcated in such a way that two trees come in each plot laid for 7 different treatments in 8 th treatment plots were made in open field without tree. The seed sown on the ridge with spacing 25 cm plant to plant and 45 cm row to row in all the plots prepared for the experiment. At the time of ridge and furrow preparation and before sowing of seed in each plot has been treated with the particular treatment according to the designed layout and as per recommended quantity of manure/ fertilizer. Basal dose: 45 kg N, 37 kg P2O5 & 40 kg K2O ha -1 in the form of urea, super phosphate and murate of potas, N is applied in 3 split dozes after 60 days 40 Kg and 120 days 40 Kg. Basal dose of fertilizers were mixed in treatment T 7 and T8 plots with shade and without shade respectively. 100% FYM 20 ton ha -1 was applied in treatment T 1 , 100 % Vermi compost @10 ton ha -1 was applied in treatment T 2 . 100% Mahua cake @ 0.5 ton ha -1 in treatment T 3 , 50% FYM in combination with 50% Mahua cake in treatment T4, 50% Vermi compost in combination with 50 % Mahua Cake in treatment T 5 and 50 % FYM in combination with 50% Vermi compost was applied in treatment T 6 .
Organic manure was applied in plot 1 -6 as per treatment. However in plot no. 7 and 8 recommended dose of fertilizer were applied. The crops started to flower after 100 to 110 days of after sowing. The female flowers set fruits in nearly three to four days and then the capsules take nearly a month to mature. When the fruits turn brown in color and white opening at angles of the ridges of the pod was harvested. Otherwise they split and seed fall off and go waste. So regular harvesting of capsules from the plots was carried out to pluck the mature capsule kept in the two days for sun drying. After threshing the seed yield was recorded for each and every treatment regularly till the maturity of whole crop harvested.
Oil recovery was estimated by hydro distillation method using Clevenger Apparatus [3]. To estimate the oil recovery (%) 100 gram of crushed seed was taken. The chopped sample was put in 1000 ml capacity flask half filled with water. Distillation was done for about four to five hour. The oil being lighter than water was collected in the burette and reading was recorded. The oil yield per hectare was estimated by extrapolating the oil amount of oil recovered in the distillation. The total oil yield obtained was recorded in kilogram per hectare. The observations regarding morphological growth characters viz., plant height, number of leaves, collar diameter, capsule length, capsules diameter and capsules biomass. Yield attributes viz., no of capsules plant -1 , no. of seed capsules -1 , seed test weight, seed yield hectare -1 and oil yield hectare -1 were tabulated and analyzed statistically using randomized block design. Critical differences (CD) were calculated at 5% level of significance.

Morphological Characters
The plant height of Muskdana was significantly influence with the increasing age of crop (Table 1) (Figure 1). The

International Journal of Environmental Sciences & Natural Resources
Maximum average plant height of Muskdana was recorded in T 2 (63.71cm) treatment 100% Vermi compost followed by T 1 (60.02cm) treatment FYM. The minimum average plant height was observed in T 3 (42.57cm) 100% Mahua cake treatment in full maturity. This may be low nutrient availability or allelopathic affect of Mahua cake in growth period of crop. The similar results are reported by [4] in Okra (Abelmoschus esculentus) crop and [5] also reported in patchouli crop. The Maximum average collar diameter of Muskdana was recorded in T 2 (1.12 cm) treatments 100% vermi compost followed by T 6 (0.99 cm) treatment. The minimum collar diameter was observed in T 5 (0.79 cm) VC 50% + MC 50% treatment in interaction effects (Table 1) ( Figure  1). Similar result was found by [5,6] in patchouli crop. The Maximum average number of leaves of Muskdana was recorded in T 2 treatment (29.80) 100% Vermi compost followed by T 1 FYM treatment (27.58). The minimum number of leaves was observed in T 5 (17.62) VC 50% + MC 50% treatment in interaction effects. Similarly Sharanabasappa et al. 2007 reported that the collar diameter was significantly increased in Agro forestry system with 100 % Vermi compost indicating an organic fertilizer had a marginal effect on vegetative growth in patchouli.
The application of Vermi compost enhances the activity of beneficial microbes like N 2 fixers and colonization by Mycorrhizal fungi and hence plays a significant role in N 2 fixation and phosphate mobilization leading to better uptake by the plant. Thus the increased availability of nutrients and uptake by the plants would have resulted in maximum plant height, collar diameter and number of leaves in plots treated with vermi compost in the present experiment under multitier Agro forestry system.  Table 1 revealed that the number of capsules per plant, number of seed per capsules and seed test weight of Muskdana showed that T 2 treatment 100% vermi compost produced maximum number of capsule, number of seeds and seed test weight (22.37 No,110. No. and 1.78 gram) respectively, followed by T 1 , 21.50 no. of capsules/plant; T 6 , 108.67 seed/capsule and T6, 1.69 gram seed test weight. However lowest no. of capsule per plot was found in T 3 , (15.74 no. of capsule/plant and 99.67 no. of seed/capsule) and lowest seed test weight T 8 , 1.56 gram/100 seeds. Similar findings have been reported by [7,8] in Abelmoschus moschatus crop, [9] in Sweet flag and [10] in Sweet basil.

Seed and Oil Production
After harvest the seed yield was computed and presented in (Table 1) (Figure 2) Seed yield showed statistically significant (P<0.05) by organic manure and fertilizer treatments under Agro forestry system and as a sole crop in open condition without trees. Seed yield was recorded highest in treatment T2 (10.04 q/ha), followed by (9.74 q/ha) in T 7 respectively under shade condition. However, minimum seed yield was observed in Mahua cake 100% treatment (8.30q ha -1 ) in Muskdana. Volatile oil -yield showed statistically significant (P<0.05) by organic manure and fertilizer treatments under Agro forestry system and open condition. The data appended in (Table 1) ( Figure  2) revealed that maximum volatile oil yield was recorded in treatment T 2 (1.16 kg ha -1 ) followed by (1.01 kg ha -1 ) in T 6 respectively under multitier Agro forestry system as compared with the other treatment and in sole crop with RDF. However, minimum volatile oil yield was observed in treatment T8 (0.54 kg ha -1 ) Muskdana as a sole crop. However T 6 treatment the oil % was second highest after T 2 might be because of nutrient availability and slow constant release of nutrient enhances the oil content may be one of the reasons. Similar findings were obtained by [6,11] in Patchouli. Reported that higher oil recovery from O. sanctum under Silvi-medicinal may have resulted due to better soil nutrient status and positive effect of tree shade [12] also reported significant effects on essential oil recovery from O. sanctum grown under Peach, Grewia, and Morus based Agro forestry system [13][14][15][16][17][18][19][20].

International Journal of Environmental Sciences & Natural Resources
The effect of intercropping on the growth of tree results showed that there was a minor difference in height increment in the tree after harvest of intercrops because of 10 month period did not showed much increment in height and diameter. Thus, in the present study it could be concluded that 100% vermi compost, 100% FYM and their combination are the best organic sources for Muskdana seed and oil production, when compared to other sources of organic and inorganic nutrients under multitier Agro forestry system as compare with the sole crop without tree and recommended to cultivate this crop under tree based Agro forestry system for higher income [20][21][22][23].