摘要
应用^(15)N标记化肥硫酸铵(丰度29.07％),研究了叶面喷施钛化合物溶液对小麦产量及吸收利用化肥氮的影响。试验表明,叶面喷施10和50ppm钛(Ti)溶液可促进小麦产量的增加,使小麦植株和籽粒中来自肥料和土壤的氮明显增多,促进了颖壳中的氮向籽粒转运。植株、籽粒对化肥氮盼利用率由对照的53.1％和31.1％分别提高至56.6—60.4％和37.9—44.4％,达差异显著和极显著水平。
The effect of foliar application of Ti-compound on the uptake of nitrogen and wheat yields was studied by using 15N tracing technique.The results of pot and field experiments showed that foliar application of 10 ppm Ti solution increased the yields of spring and winterwheat by 20.0% and 6.9%, respectively.The foliar application of 10 and 50 ppm Ti solution increased the N content in wheat plant and grain. Experiment with 15N indicated that the N utilization rates of wheat grain in 0 (CK) , 10, 50, and 200 ppm Ti treatment were 31.3%, 37.9% 44.4% and 39.8%, respectively. The differences were significant ( L.S.D.=±4.1 %, P=0.01).It also indicated that the N contents from soil in grain were 23.5%, 39.2% and 25.5% hi-gher in the treatments of 10, 50 and 200 ppm Ti solution respectively than that in control ( L.S.D.=±15.7% , P=0.05)and that the N contents from soil in husk were 12.25%, 16.58% and 18.57% lower than that in control respectively.The foliar application of Ti solution promoted the redistribution of N in plant organs of wheat. Under 10, 50 and 200 ppm Ti, the percentage of 15N in wheat grain were increased by 13.84%, 19.96% and 20.29% respectively in comparison with control. However, the percentage of 15N in wheat husk decreased by 12.25, 16.58% and 18.57 respectively.
出处
《核农学报》
CAS
CSCD
1989年第1期23-27,共5页
Journal of Nuclear Agricultural Sciences
关键词
钛化合物
叶面喷施
氮素
Ti-compound, wheat foliar application, N utilization rate
