不同密度农桐间作土壤养分与小麦产量关系的研究

Study on the Relationship between Soil Nutrients and the Yield of Wheat in Paulownia-crop Intercropping System of Different Density

研究了不同密度农桐间作条件下，土壤养分随时间变化的规律及养分与小麦产量之间的关系，结果表明：不同密度（５ｍ×３０ｍ，５ｍ×４０ｍ和５ｍ×５０ｍ）对Ｆｅ含量有一定影响，而对有机质，Ｎ，Ｐ，Ｋ，Ｍｎ，Ｚｎ和Ｍｇ含量无显著影响；３种间作密度中Ｋ含量随时间变化显著，Ｐ含量在５ｍ×３０ｍ间作密度中随时间变化显著，Ｆｅ和Ｍｇ养分含量在５ｍ×４０ｍ密度中随时间变化显著，而３种间作密度中有机质，Ｎ，Ｍｎ和Ｚｎ含量随时间变化不显著；

A study was carried out on the change laws of soil nutrients with time and the relations between nutrients and the yield of wheat in paulownia crop intercropping system of different density.Results showed that different intercopping density had certain effect on Fe,but had little effect on organic matter,N,P,K,Mn,Zn and Mg.K under the three density intercropping systems and P in 5m×30m field as well as Fe and Mg in 5m×40m intercropping field had significant changes with time.The wheat yield was closely related to the soil nutrients.