施肥对失管腰果植株生长和产量的影响

2005～2007年在海南省东方市新龙镇已失管5a的腰果无性系FL30果园进行施肥管理,开展NPK L9(34)正交设计施肥试验,研究施肥对植株恢复生长和增产效果的影响.结果表明:氮磷钾肥配施明显地促进植株恢复生长和提高腰果产量;初花期和盛花坐果期,氮素是影响腰果产量的重要营养元素,试验第1,2年植株叶片氮素含量与腰果产量分别呈现直线极显著正相关和直线显著正相关;在低氮条件下,施磷钾肥的增产效果不明显.

Effect of Fertilizer Application on Growth and Production of Cashew without Management

At the cashew plantation of Clone FL30 where no management had been done for 5 years in Dongfang City, Hainan Province, a NPK fertilization experiment with L9(34) orthogonal design was conducted to study the effect of fertilizer application on cashew growth and production from 2005 to 2007. The results showed that application of nitrogen, phosphorus and potassium fertilizers improved cashew growth and production significantly. During the initial flower stage, and the full flower and fruitsetting stage, N was an important nutrient element to increase cashew production and had significant positive correlation with N content of cashew leaves; P and K fertilizers did not increased production obviously when N was applied at a low level.