Abstract: Soil fertility was significantly improved when Keza 1 soybeans were interplanted in the young loquat orchard. Rapidly available phosphorus in soil increased from trace to 18.27mg/kg, total phosphorus and rapidly available potassium increased by 260.0% and 183.6%, organic matter, total potassium, total nitrogen and rapidly available nitrogen increased by about 40%, respectively. The results also showed that under-crop sowing improved the tree nutrition and promoted the tree growth. The contents of nitrogen, phosphorus, potassium, calcium and magnesium in leaves increased by 9% and above, the crown diameters, shoot number and the percentage of head sprouting increased by 27.3%, 57.7% and 86.8%, respectively. The quality of fruit also improved after under-crop sowing.

Key words: loquat, young orchard, under-crop sowing, soybean

摘要： 幼龄枇杷园套种科杂1号,显著提高土壤肥力,土壤速效P由清耕对照的痕迹增至18.27 mg/kg,全P和速效K分别增加260.0%和183.6%,有机质、全N、全K和速效N的增幅在40%左右;研究还表明,套种提高了枇杷树体营养和促进丰产树冠的形成,叶片N、P、K、Ca、Mg含量均比对照区增加9%以上,冠幅和枝梢数分别增加27.3%和57.7%,枝梢抽穗率提高86.8%,同时,套种对改善果实品质也有一定作用。

关键词: 枇杷, 幼龄果园, 套种, 大豆