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Abstract ▼ AI-Helper

This study was conducted to understand the effect of the different treatment level of head back pruning (HBP) on flowering, fruiting and nut qualities. The average number of pistillate flowers per bearing mother branch (BMB) ranged greatly from 0.5 to 60.0. For all cultivars as the level of HBP trea...

This study was conducted to understand the effect of the different treatment level of head back pruning (HBP) on flowering, fruiting and nut qualities. The average number of pistillate flowers per bearing mother branch (BMB) ranged greatly from 0.5 to 60.0. For all cultivars as the level of HBP treatment increases, the number of pistillate flowers per bearing branch (BB) and BMB decreased. For all cultivars the number of branches developed per BMB began to decrease above 30% HBP treatment level. The number of burrs per BB ranged from 1.0 to 2.0. Within 'Daebo' the number of burrs per BB increased with increasing HBP treatment level. The rate of fallen fruits was the lowest of 22.6% at the 50% HBP treatment level of 'Tsukuba', whereas the rate was the highest in 'Pyeonggi'. Nut weight increased with decreasing the number of burrs per BB. Nut yield per BMB showed a tendency of decreasing with increasing the HBP treatment level. Within a HBP treatment level nut grade indicating nut quality varied greatly among cultivars. For all cultivars except for 'Pyeonggi', the proportion of specially large nuts above the average weight increased as the HBP treatment level increased. The soluble solids content showed no significant difference among the HBP treatment levels just right after harvesting of nuts. After 8 weeks of harvesting, however, the soluble solids content increased about 3.3% to 5.3%. and was highest at the 50% HBP treatment level. There were no significant differences among the HBP treatment levels and cultivars in the nut hardness which is highly related to the storage as well as the initial soluble solid content.

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