Review on Effect of Fruit Load on Dry Matter Production and Partitioning in Crops

The fruit load has a large effect on dry matter production and partitioning.The fruit is the main organ of the "sink", and there is competition for nutrients in the growth and development process.Excessive amount of fruits per tree decrease fruit size and quality, consume tree reserves and reduce cold hardiness.The proper fruit thinning can improve the average weight of fruit, improve the fruit quality and fruit commodity rate Meanwhile, the proper crop load can be conducive for improving the leaf photosynthesis leads to increased dry matter production.The decline of crop load can significantly increase the leaf area, and the total nitrogen content of leaves so as to improve the leaf Photosthetnic and delay leaf senescence, that increasing dry matter production and decreasing dry matter partitioning.Stem, trunk and root growth decrease almost linearly with crop load ,while dry matter allocation relatively to leave to shoot ratio.Increase in fruit firmness with decreasing crop load is not well understood but could be related to the increase of soluble solids and dry matter.An increase in fruit firmness with lower crop loads.The decrease in dry-matter percentage of the fruits was also partly the result of the increased growing period of individual fruits, because the dry matter percentage of fruit decrease at increasing in fruit load.Generally, from this review of literature we can conclude that controlling fruit load effectively regulated the distribution of assimilate for growth, development and overall life cycle of plant.