摘要
对杉木中龄林科学施肥是杉木速生丰产的1项重要抚育措施,在氮缺乏、磷钾含量较高的杉木中龄林林地上,在垦覆的条件下,施氮肥增产效果明显。1993～1997年,施尿素33kg/666.7m2,22kg/666.7m2,11kg/666.7m23处理相对于对照(垦覆不施肥),其蓄积生长量净增率为116.24%、78.08%、51.25%,单施磷肥、钾肥增产效果不明显,在同一施氮水平下,随混施磷肥或钾肥的增加,增产效果降低。
Scientific fertilizer over middle-aged forest of Cunninghamia lanceolata （Lamb.） Hook. is an important tending measure for its fast- growing and high- yield. The effects show obvious in increasing the yield under cultivation in shortage of high contents of N, and P and K in the forest land. Put urea by 33 kg/ 666.7 m^2, 22 kg/666.7 m^2, 11 kg/666.7 m^2 in three treatments against CK （cultivation without fertilizer） in 1993-1997, its net increment of volume growth was as 116.24% ,78.08% ,51.25% individually. The effect of yield increased was not obvious only by applying P and K under the same N applied, however, the effect was even lower along with mixed P and K applied.
出处
《湖北林业科技》
2008年第4期24-27,30,共5页
Hubei Forestry Science and Technology
关键词
杉木
中龄林
垦覆
施肥
Cunninghamia lanceola ta （Lamb.） Hook.
middle- aged forest
cultivation
fertilizer
