Abstract:

The effects of five interstocks were studied on shoot growth，fruiting and accumulation of mineral elements in leaves of‘Whangkeumbae’pear（Pyrus pyrifolia Nakai）in order to provide a basis for interstock selection in pear. The rootstock was P. calleryana Decne. Five interstocks were‘K11’（P. communis × P. pyrifolia），‘Zhongai 1’（P. ussuriensis Maxim× P. communis），‘OHF51’（P. communis L.），‘OHF97’（P. communis L.）and‘FBA’（P. communis L.）respectively. The shoot growth，yield and mineral element contents of‘Whangkeumbae’grafted on different interstocks were measured during  2011—2014. The results showed that‘K11’and‘Zhongai 1’had better growing compatibility with the rootstock and the scion. In the first year after grafting，‘Whangkeumbae’trees grafted on interstock‘OHF51’exhibited the highest amount of flowers in the first blossom year，however the higher yield per tree and largest individual fruit weight were observed on‘Whangkeumbae’trees grafted on‘OHF97’and‘Zhongai 1’in the second blossom year. The shoot growth of‘Whangkeumbae’trees grafted on‘K11’was significantly higher than that of‘Whangkeumbae’trees grafted on other four interstocks，although the shoot growth tendency of‘Whangkeumbae’trees grafted on different interstocks was similar. During the growing stages. the contents of N，P，Ca，and Mg，in the leaves of the scion trees grafted on‘K11’were higher than those on the other interstocks. The content of Mn was the highest on‘OHF51’and Zn content was higher on‘OHF97’than that on other interstocks. However，the contents of N and P in leaves of the ‘Whangkeumbae’trees grafted on‘Zhongai 1’were slightly higher in later growth stage，‘Zhongai 1’was better than the other four combination.

Key words: pear, interstock, mineral element