摘要
以清耕为对照,研究了四川大英县李园生草后采用刈割覆盖、刈割压埋、畜肥还园3种处理方式对土壤理化性状及李树生长的影响。结果表明,土壤水分含量以畜粪还园最高(19.665%),较清耕(13.950%)增加5.715%;刈割覆盖的土壤密度最小(1.301 g/cm3),较清耕减小0.177 g/cm3;刈割覆盖夏季降温、冬季增温效果最明显。3种处理土壤各养分含量都较清耕有所增加,且有机质、全K极显著增加,速效K显著增加;随年限的延长,刈割覆盖、刈割压埋的多数养分含量逐年递增,而清耕部分养分出现负增长。3种处理的李树新梢生长量、叶片叶绿素含量和根系活力都极显著高于清耕。
By using cleaning tillage as control, a study was done in a plum tree orchard lying in Daying county of Sichuan province to explore the effects of three treatments of ‘mowing and covering＇, ‘ mowing and burying＇, ‘returning the livestock＇s feces to orchard＇ on physical, chemical properties of soil and plum trees. The conclusion was reached： the content of water of returning the livestock＇s feces to orchard is the highest （19.665 % ）, 5. 715 % higher than cleaning tillage （ 13. 950 % ） ; soil density of mowing and covering is the least, which is 1.301 g/cm^3 and 0. 177 g/cm^3 less than cleaning tillage; the decrease of temperature in summer and increase in winter are the most apparent under the treatment of mowing and covering. The content of all soil nutrients of three treatments increases to some extent compared with the control, especially organic matter, total K increases significantly, rapidly available K does significantly; with the prolongation of age, the content of most of soil nutrients increases under the treatments of mowing and covering, mowing and burying, yet the content of some soil nutrients increases negatively. The new shoot length, the content of leaf chlorophyll and root activity under the three treatments are all significantly higher than those of cleaning tillage.
出处
《四川农业大学学报》
CSCD
2005年第4期420-423,435,共5页
Journal of Sichuan Agricultural University
基金
国家"十五"攻关项目--中国西部重点脆弱生态区(四川)综合治理技术与示范(2001BA606A06)
关键词
生草
李树
土壤
理化性状
graze-planting
plum trees
soil
physical and chemical properties
