Shandong Heze Locust Clones Selection

He Ze City is the largest locust (Robiniapseudoacia Linn.) breeding base in ShandongProvince, a lot of fine clones had been selected and their propagation techniques developed.But those clones can not satisfy for the demand of the market. So, Breeding new clones isneeded for developing effective forestry. In this thesis, early test data was used and the newexperiment forest mainly analyzed for selection new locust clones.According to the process for selection locust clones, fine single tree should be selectedfrom the offspring test stands as the ortets for clones. In this study the spreading clone inShandong Province such as Lu Ci No.1, Lu Ci No.7, Lu Ci No.9, Lu Ci No.59, He Ci No.1,He Ci No.2, He Ci No.4 and He Ci No.5 were planted for comparing. Nursery stocks weremade by grafting and root cutting propagation, and three representative sites were selectedfor plantation. The test was randomized block designed, three to five times repeated, five tonine stems each block, three cm apart in the row and four cm spacing between rows or fourcm apart in the row and four cm spacing between rows.The investigated data of three to four years old test stands was used for analysisaccording to the conclusion of correlation between early and maturation period selection.Two new clones of Yun He No.42 and Yun He No.68-3 had selected by analysis on the jointtraits of tree height, diameter of breast height (DBH), wood volume, form and quality index,adaptability and disease resistance ability. These two clones comparatively had a highermass growth and good form and high quality, strong diseases and insect resistant ability.Moreover, they showed strong adaptability to low underground water level, no irrigatecondition and bad soil fertility.