摘要
通过对杉木幼林施肥 1 a及 1 7a后土壤养分变化的研究 ,结果表明 ,杉木幼林施肥 1 a后 ,比无施肥 ( CK)土壤对照有机质、全氮和速效磷以及土壤 p H值和小于 0 .0 0 1 mm的粘粒变化不大 ,土壤的速效氮增加 1 4.96%～ 1 5.62 %,速效钾增加 2 6.0 9%～ 43.75%;杉木幼林施肥 1 7a后施肥比无施肥 ( CK)的土壤有机质增加 1 7.1 3%～ 2 3.76%、全氮增加 1 2 .37%～ 1 4.67%、速效氮增加 1 3.1 0 %～ 66.2 4 %、速效磷增加 1 3.95%～ 2 4 .2 4 %和速效钾增加 6.52 %～ 36.1 1 %;土壤 p H值和小于 0 .0 0 1 mm的粘粒变化不大 ;3年生杉木施肥后当年效应显著 ,每株施纯元素NPK混合肥 0 .2 5kg( N为 0 .1 5kg;P为 0 .0 5kg;K为 0 .0 5kg) ,即 375kg/hm2 .施肥比无施肥对照 ( CK)树高增加 1 4.0 4 %,地径增加 1 8.36%;1 7a后 ,施肥持续效应也是显著 ,施过肥的比对照 ( CK)树高增加 1 9.79%,胸径增加 1 1 .65%.
A study on soil nutrient variation of cunninghamia lanceolata after 1 year and 17 years with fertilization was carried out.The results showed that the content of organic matter, total N, available P, pH and <0 001 mm clay of the soil with fertilization were not significant different with non fertilization of 3 years old Chinese fir, but the change of available N was from 14 96% to 15 62% and available K was from 26 09% to 41 95% after 1 year with fertilization After 17 years with fertilization, the change of organic matter was from 17 13% to 23 76%,total N was from 12 37% to 14 67%,available N was from 13 10% to 66 20%, available P was from 13 95% to 24 24%,available K was from 6 52% to 36 11%,but the pH and <0 001 mm clay had not obvious change Fertilization effect was obvious in 3 year old Chinese fir plantation by mixed fertilization (N:0 15kg;P:0 05kg; K:0 05kg per individual), its results showed that its mean increase rate of height was 14 04% and the increase of diameter at breast height was 18 36% as compared with control spot, and its mean increase rate of height was 19 79% and the increase of diameter at breast height was 11 65% as compared with control spot after 17 years with fertilization
出处
《福建林学院学报》
CSCD
2000年第3期265-268,共4页
Journal of Fujian College of Forestry
基金
福建省自然科学基金资助项目! ( F991)
关键词
杉木
施肥
土壤养分
幼林
Cunninghamia lanceolata
fertilization
soil
nutrient dynamic
