P. Masilamani , C. Dharmalingam , K. Annadurai

Abstract

A study was conducted to find out the effect of Calcium oxychloride pre-sowing treatment to improve germination of fresh and ten month-old drupes (fruit with seed) of Teak. The drupes were collected from Top slip seed production area and the drupes were subjected to alternate soaking and drying for 5 days at 12 hrs interval, the 6th day soaking in different concentrations of Calcium oxy chloride (2, 4, 6, 8 and 10%) solution for 12 hrs, compared to water soaking and dry drupes as control. The presoaked drupes were sown in both open and mist chamber condition. Fresh drupes were subjected 2% calcium oxy chloride registered improved germination up to 22% against 4% in control in open condition and 20% and 46% germination in mist chamber with 6% CaOCl₂ for fresh and ten month old drupes respectively. Fresh drupes took more number of days for emergence than ten months old drupes, both under open and mist chamber condition.

Keywords

Teak (Tectona grandis Linn. f.), Drupes, Germination, Calcium Oxychloride Presowing
Treatment

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P. Masilamani , K. Kumaran , K. Annadurai , J. Balamurugan , I. Sekar

Abstract

No abstract

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P. Masilamani , P. Yasodha , K. Annadurai

Abstract

A study was made to assess the influence of seed treatments and sowing conditions on germination and initial seedling vigour of Indian almond. Prior to germination the fruits were subjected to the following pre-sowing treatments viz., depulped fruit (manually) without water soaking , depulped fruit soaking in water followed by drying (S-D) for 7 days at 12 hours interval, depulped fruit S-D for 6 days at 12 hour interval and on 7^th days soaking in different concentration of KNO₃ (1 and 2%), Thiourea (1 and 2%), CaOCl₂ (1 and 2%) and H₂ O₂ (1 and 2%) for 12 hour and whole fruit (without depulping) served as control. The pre conditioned and control fruits were placed for germination in open sun light and partial shade condition. Sixty days after sowing, results revealed that the pre conditioning of depulped fruits i.e. soaking in water followed by drying (S-D) for 6 days at 12 hr interval and on 7^th day soaking in 2% CaOCl₂ for 12 hr. enhanced germination (98%) of Terminalia catappa under open sunlight condition. Whole fruits took more number of days for emergence than depulped fruit.

Keywords

Terminalia catappa, Pre-sowing Treatments, Sowing Conditions, Germination, Seedling Vigour.

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P. Masilamani , P. Saravanapandian , K. Annadurai , U. Arulanandu

Abstract

An experiment was conducted to find out the influence of different soil pH and farm yard manure addition on seed germination, seedling growth and bio-chemical constituents of Albizia lebbeck. The seeds were sown in soil with different pH (8.1, 9.0, 10.2 and 10.5) and the soil with different pH mixed with sand + farmyard manure (2:1:1 ratio) compared with control (red earth + sand + farmyard manure at 2:1:1 ratio). Significant differences were observed among different treatments for all the parameters of germination and seedling growth attributes of 25 days old seedlings and survival percentage, seedling growth attributes and chemical constituents (Chlorophyll a, b and total and total N, P and K content) of 180 days old seedlings. This species is able to tolerate at extreme soil pH of 10.5, when the soil is mixed with sand and farm yard manure at 2:1:1 ratio, in terms of seed germination (49.0%), seedling growth and chemical attributes of the seedlings.

Keywords

Albizia lebbeck, Germination, Farm yard manure, Seedling growth, Soil pH

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P. Masilamani , M. Paramathma , C. Chinnusamy , R. Jude Sudhagar , K. Annadurai

Abstract

Field experiments were carried out to evaluate two different pre-emergence herbicides on weed control efficiency, germination and seedling growth of pungam (Pongamia pinnata) nursery. Three days after sowing, pre-emergence herbicides viz. atrazine (50% WP) and fluchloralin (45% EC) were applied at different concentrations on the nursery bags using rose cane. Thirty days after application of herbicides, observations were made on germination percentage and 50 days after application of herbicides, number of predominant weeds (broad leaved, grasses and sedges), weed dry weight(g), weed control efficiency and ischolar_main length (cm), shoot length (cm) and dry matter production (g seedling^-5) of pungam seedling in each treatment were recorded. The results revealed that the compatibility of application of pre-emergence herbicide of atrazine at 0.10% - 0.20% can be used effectively to control broad leaved weeds, without impairing the germination and seedling growth of Pongamia pinnata.

Keywords

Pongamia pinnata, Pre Emergence Herbicides, Germination, Seedling Vigour

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