摘要
为探明沙地土壤的供肥特点及作物的土壤养分限制因子,进而提出高产高效施肥技术措施。试验以"夏玉米→花生—冬小麦"的两年三熟制为种植周期,采用定点不同时期取土化验的方法来研究沙地土壤的的供肥特点;运用最小养分率的原理来研究三种作物产量的土壤养分限制因子。结果表明:在冀东沙地,土壤中速效N、速效P含量的变化趋势呈一个"波谷"形状,而速效K含量的变化趋势呈一个完整的"波形";沙地土壤中N和K是三种作物产量的共同的限制因子,根据这两个结论,提出合理有效地施肥技术措施:夏玉米要N、K肥并重,P肥可以不施;花生要增施K肥,稳施N肥,兼顾P肥;冬小麦要三者兼顾,以N、K肥为重点。
The paper is meant to study the features of supplying fertilizers for the sandy soil and the soil nutrient restriction factors of crops,and propose the fertilization technique of high yeild and high efficiency.The features of supplying fertilizers for the sandy soil is studied through examining the soil nutrient content of the same place at different period during the rotation period of summer maize→peanut-winter wheat.The research adopts the principle of minimum rate of nutrient to study soil nutrient restriction factors of these three crops.The result shows that in Jidong Sandy Region,the line of trend of effective-N and effective-P is a trough form,but a complete wave form of effective-K;in the sandy soil,effective-N and effective-K are the common soil nutrient restriction factors of the three crops.Based on these two conclusions,the effective methods of fertilization are forward：for summer maize,the fertilizer N and K should be supplied at the same amount,but the fertilizer P can be saved;for the peanut,the amount of fertilizer K should be increased,fertilizer N is provided steadily and fertilizer P may apply few;during the winter wheat period,these three fertilizers should be supplied but focus on fertilizer N and K.
出处
《中国农学通报》
CSCD
北大核心
2010年第16期184-186,共3页
Chinese Agricultural Science Bulletin
基金
河北省唐山市科技局科技攻关项目(09120203A-15)
关键词
限制因子
沙地土壤
供肥特点
施肥技术
种植周期
restriction factor
sandy soil
features of supplying fertilizer
fertilization technique
crop rotation period
