摘要
以缺Ｍｎ土壤为基质进行的小麦模拟土柱试验结果表明，不同施Ｍｎ深度条件下３３１７和川麦２２２个小麦基因型的缺Ｍｎ症、产量、根系分布和体内Ｍｎ含量均存在着显著差异．随着施Ｍｎ深度的增加，Ｍｎ肥的增产效果更为明显，川麦２２施Ｍｎ的增产幅度高于３３１７．初步认为，３３１７耐缺Ｍｎ能力高于川麦２２，与其根系在中下部土层分布比例高，吸Ｍｎ能力强有关．土柱试验发现小麦苗期的缺Ｍｎ症在中下部土层供Ｍｎ时明显恢复。
Simulated Mn deficient soil column studies with
wheat show that the Mn deficient symptom, grain yield, root system distribution and Mn content
of two genotypes (Chuanmai 22 and genotype 3317) were greatly affected by Mn application
depth. The yields of both genotypes were obviously increased with the application depth of Mn
fertilizer, and the increment of Chuanmai 22 was higher than genotype 3317. It was suggested
that the higher tolerance to Mn deficiency of genotype 3317 than Chuanmai 22 was related to
the higher percentage of its roots distributing in the middle and lower soil layers and to the
stronger capacity of absorbing Mn from soil. It was also found that the Mn deficient symptoms
of wheat at seedling stage could be disappeared after Mn fertilizer was applied at mid late
stage in the middle and lower soil layers, indicating that applying Mn fertilizer at mid late stage
played an important role to the formation of wheat yields.
出处
《应用生态学报》
CAS
CSCD
1999年第2期179-182,共4页
Chinese Journal of Applied Ecology
基金
国家杰出人才基金
关键词
小麦
基因型
施肥深度
Mn application depth,
Wheat genotype, Tolerance to Mn deficiency.
