ISHS Acta Horticulturae 696: VII International Symposium on Temperate Zone Fruits in the Tropics and Subtropics - Part Two
IMPACT OF NPK ON THE NEMATODE POPULATIONS AND YIELD OF PLUM (PRUNUS SALICINA) |
| Authors: | G.C. Sharma, B.S. Thakur, A.S. Kashyap |
| Keywords: | nematodes, plum, NPK |
| Abstract:
In all six nematode species viz., Pratylenchus penetrans, Tylenchorhynchus mashhoodi, Meloidogyne incognita, Pratylenchus prunii, Macroposthonia xenoplax and Helicotylenchus dihystera were found harbouring the orchard initially and the former two nematodes were most prevalent. Seven treatments (N, P, K, N+P, N+K, P+K, N+P+K) along with one control treatment were maintained. Among the phytoparasitic nematode populations recorded for different treatments at harvesting, P+K treated plants showed 50 per cent reduced population in the rhizosphere in comparison to control. Potassium treated plants exceptionally supported 93 per cent higher population over control. Yield improvement in different treatments over control ranged between 6-65 per cent and it was maximum for N+P+K. Minimum yield harvest (31 kg) with highest population of phytoparasitic nematodes (790/ 200 cc soil) was recorded from K applied trees. Significantly higher yield (53 kg) with considerably reduced nematode population (230) was extracted from N+P+K applied plants. However, with equivalent reduction in nematode population (210-240), treatments like P, P+K and N could not improve the yield to desirable level. | |
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