西洛四优系在淳化泥河沟试区生长健壮，发育良好，高接树冠恢复快。６年后坚果产量以西洛３号单位投影面积产量最高（为２８０．２１ｇ／ｍ２），西洛４号稍差。丰产性状综合指标以西洛２号最高、西洛１、２、３号经济性状均超过国家一级标准，一些指标达到国家优级标准。６年试验证明西洛１，２，３号适宜在黄土高原南部地区推广和发展。 Silo four excellent lines in Chunhua Nihe test area grow robust, well-developed, high recovery canopy quickly. Six years later, the yield of nuts in Xiluo 3 was the highest (280.21g / m2) and the output of Xiluo No.4 was slightly worse. The comprehensive index of high yield traits was the highest in Xiluo No.2, and the economic traits of Xiluo No.2 and No.23 surpassed the national first-class standard, and some of the indicators reached the national excellent level. Six years of experiment proved that Silo 1, 2 and 3 are suitable for promotion and development in the southern area of ​​the Loess Plateau.