Tolerance to Lime - Induced Chlorosis and Drought in Grapevine Rootstocks - Abiotic Stress: Plant Responses and Applications in Agriculture - page 280

Number of roots per diameter (mm) class

Number of
roots per m 2 Rooting index

Rootstock

<0.5 0.5-2 2-5 5-10 >10

Berlandieri 13/5 2069 39.6 1792 226 38 10 3

101-14 Mgt 1604 27.1 1210 337 43 11 3

775 P 1006 44.7 839 145 16 4 2

1103 P 2660 41.9 2199 399 53 6 3

99 R 1138 28.9 833 267 30 8 0

110 R 1468 29.9 1103 319 37 9 0

140 Ru 635 20.2 483 122 21 6 3

Table 1. Distribution of roots of different rootstocks cultivated under conditions of South Africa (Swanepoel &
Southey, 1989). (Rooting index = number of roots <2 mm/ number of roots ≥2 mm).

To assure a good tolerance of plants to drought and lime is necessary assure a proper devel‐
opment of the root system (Figure 1). Deep loosening of soil is also very important (Figure 2).

Figure 1. Root system of a five-year-old vine in clay loam soil.