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KEY STUDIES

KEY FINDINGS OF FORESTRY RESEARCH IN THE LAST FIVE YEARS

High yielding phenotypes of Casuarina equisetifolia

In Casuarina equisetifolia, 79 female plus trees were selected after intensive genetic combing in the state to form clonal seed orchards at Neyveli during 1986. From the 79 plus trees 6 superior female trees were identified and selected. The performance of these 6 female trees was assessed at two research centers and also in farmer’s field. It was found that female tree No. 20 was performing very well followed by female tree No. 71 and 176. The volume gained by Tree No. 20 was 30% higher than the other trees.

Recommendation

Therefore propagules of the female trees clone No. 20, 71 and 176 are recommended for any further planting program.

SANDAL RAISING TECHNOLOGY IN DIFFERENT HOST SPECIES

Sandal with stylo scabra

The experiment has been taken up to find out the techniques of raising of Sandal plantations under rain-fed conditions, through broadcasting of sandal seeds with appropriate host that could be of fodder value and also could grow under rain-fed conditions. Some non-conventional host species such as Stylo scabra, Ordinary grass, Cajanus cajans, Sorghum vulgare, Casuarina junghuniana, Manihot esculents (Tapioca), Moringa oliefera (Annual drumstick), Desmanthus varigatus (Velimasal), Muntanjea calabra (Singapore cherry were tried.

The following hosts are found to be best for these locations.

1	Seshanchavady	Stylo scabra, Casuarina junghuniana
2	Lokkur	C. junghuniana, Stylo scabra
3	Kurumbapatti	C. junghuniana, Moringa olifera
4	Gobachamdram	Stylo scabra, Cajanus
5	Ramanahalli	Sorgum vulgare, Stylo scabra
6	SFRI, Vandalur	Stylo scabra, Casuarina junghuniana

STUDY ON PHYTO-REMEDIATION

SELECTION OF SPECIES FOR SEWAGE WATER RECLAMATION

In the year 1999-2000 about 39 economically important species including Bamboo and Canes were chosen based on their efficiency in problem soils and planted for finding out the most suitable species that could perform better when sewage water was used for irrigation. They were planted at 3x3m espacement in 1m3 pits along with bio nutrients and bio fertilizers.

Recommendation

The following species were recommended for growing, under sewage water for ensuring mitigation of malady and also to get assured economic gains.

S No	Species Name	S No	Species Name
1	Thespesia populnea	12	Bambusa mukulba
2	Acacia auriculiformis	13	Bassia latifolia
3	Casuarina junghullniana	14	Terminalia arjuna
4	Bambusa nutans	15	Cassia siamea
5	Albizia lebbeck	16	Derris indica
6	Dalbergia latifolia	17	Holoptelia integrifolia
7	Dalbergia sissoo	18	Casuarina equisetifolia
8	Eucalyptus melaluca	19	Terminalia bellarica
9	Bambusa nutans	20	Hopia parviflora
10	Leuceana leucocephala	21	Grevellia robusta
11	Albizia richardiana	22	Eucalyptus tereticornis(ITC 3)

IDENTIFICATION OF SUITABLE FAST GROWING TREE SPECIES IN TANNERY POLLUTED SOILS

This experiment was conducted to identify the suitable tree species that can be successfully grown in tannery-polluted soils . The species namely Cassia fistula, Derris indica, Acacia leucophloea, Eucalyptus hybrid, Melia dubia, Bamboo, Tecomella undulata, Samanea saman, Acacia suma, Caesalpinia coriaria, Bassia latifolia, Wrightia tinctoria, Alangium lamarckii, Hardwickia binnata, Terminalia arjuna, Morinda tinctoria and Syzygium cuminii were tried in 2 x 2m espacement.

S No	RSL Factory	Common efluent treatment plant, Dindigul
1	Samania saman	Acacia suma
2	Acacia nilotica	Samanea saman
3	Syzygium cuminii	Eucalyptus tereticornis
4	Bassia latifolia	Bambusa bamboo
5	Derris indica
6	Cassia siamea
7	Hardwickia binnata
8	Inga dulce

The above listed species are recommended for tannery effluent soils.

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