Evaluation of improved willows in North Patagonia, Argentina

Size: px

Start display at page:

Download "Evaluation of improved willows in North Patagonia, Argentina"

Ernest Rodgers
5 years ago
Views:

1 Evaluation of improved willows in North Patagonia, Argentina Ing. Esteban THOMAS & Ing. Teresa CERRILLO I.N.T.A. (Instituto Nacional de Tecnología Agropecuaria, Argentina)

2 Patagonia, Argentina

3 Irrigated valleys of North Patagonia Rio Neuquén E.E.A. INTA Patagonia Norte Rio Limay Rio Negro In the North Patagonia region, there are irrigated valley areas of about ha

4 Irrigated valleys of North Patagonia Arid and mesothermal climate: Climate characteristics ( Series, INTA Alto Valle) Mean rainfall: mm per year (it is necessary to irrigate) Mean temperature in winter (July): 6.7ºC (44.06ºF) Absolute minimum temperature in winter (August 95): -11ºC (51.8ºF) Mean temperature in summer (January): 24.2ºC (75.56ºF) Maximum temperature in summer (October 99): 39.1ºC (102.38ºF) Great thermal amplitude in the region

5 Irrigated valleys of North Patagonia plateau river (Rio Negro) valley

6 Irrigated valleys of North Patagonia pears apples The main activity is fruit production

7 Other productions in irrigated valleys vineyards wines Forage (lucerne and others) cows & sheeps

8 Forest plantations in irrigated valleys of North Patagonia Poplars and willows windbrakes to protect diferent crops

9 Forest plantations in irrigated valleys of North Patagonia Poplars and willows for timber production

10 Forest plantations in irrigated valleys of North Patagonia Clones of poplar and willow mostly used: Populus nigra Itálica, Chile and Jean Pourtet (WB) Populus xcanescens (WB and TP) Populus xcanadensis I-214, I-488, Guardi and Conti 12 (WB and TP) Salix babylonica x Salix alba Ragonese INTA and Ragonese INTA (WB)

11 Evaluation of new willow clones in North Patagonia This first screening trial was established in E.E.A. of INTA. Aim: To compare the growth of the 15 new genotypes obtained by the Breeding Willow Program of INTA, from controlled crossings S. matsudana x S. alba, S. babylonica x S. alba, and from open pollination of S. alba and S. amygdaloides. A Randomized Block Design was applied, with single plots and sixteen replications.

12 Evaluation of new willow clones in North Patagonia Unrooted cuttings (0.5 m length) were planted on August The spacing used on the plantation was of 4m x 4m (625 trees/ha)

13 Evaluation of new willow clones in North Patagonia CLONE ORIGIN STATUS LOS ARROYOS INTA CIEF S. matsudana x S. alba -Controlled crossing, 1994 Registered clone, S. matsudana x S. alba - Controlled crossing, 1994 Experimental clone AGRONALES INTA-CIEF S. matsudana x S. alba - Controlled crossing, 1995 Registered clone, S. matsudana x S. alba- Controlled crossing, 1994 Experimental clone S. matsudana x S. alba- Controlled crossing, 1994 Experimental clone S. matsudana x S. alba- Controlled crossing, 1994 Experimental clone YAGUARETÉ INTA-CIEF S. alba x? Open pollination 1994 Registered clone, S. matsudana x S. alba- Controlled crossing, 1994 Experimental clone S. matsudana x? Open pollination 1995 Experimental clone S. matsudana x S. alba- Controlled crossing, 1996 Experimental clone C S. matsudana x S. alba- Controlled crossing, 1987 Experimental clone S. amygdaloides x? Open pollination 1997 Experimental clone S. matsudana x? Open pollination 1995 Experimental clone S. matsudana x S. alba- Controlled crossing, 1998 Experimental clone S. matsudana x S. alba- Controlled crossing, 1998 Experimental clone RAGONESE INTA S. babylonica x S. alba- Controlled crossing, 1957 Commercial clone /control treatment

14 Total tree heigh(cm) Evaluation of new willow clones in North Patagonia Results 7.36 ab ab ab a a ab ab a ab 6.59 abc abc abc 5.82 bc abc 5.05 c c 4.28 Los Arroyos Agronales Yaguareté C R Genotype Total height (cm) at 5 years old Analyses of variance (ANOVA) showed significant differences among clones (p<0.001)

15 Evaluation of new willow clones in North Patagonia

16 Evaluation of new willow clones in North Patagonia Results and conclusions The evaluation of growth at 5 years old shows the supremacy of S. matsudana x S. alba hybrids, standing out the clones LOS ARROYOS INTA-CIEF and AGRONALES INTA-CIEF, and a series of genotypes in final selection phase ( , , , and are the best). This assessment of new clones provides valuable information to make a first preselection of adapted genotypes to the region.these hybrid clones have shown a good performance, with suitable tree form (few branches and apical dominance). The yield evaluation of the better clones began to be carried out through field testing productivity.

17 Thank you very much!

Cover of fallen tree leaves reduces herbaceous productivity under poplars in silvopastoral systems

Facultad de Agronomía Universidad de Buenos Aires Cover of fallen tree leaves reduces herbaceous productivity under poplars in silvopastoral systems borodows@gmail.com ARGENTINA Monlezun, S.J., Cornaglia,