摘要
通过田间小区试验,研究了4种施肥条件下(不施肥、单施磷肥、单施氮肥和氮磷配施)冷型小麦不同器官的磷素营养状况。结果表明,开花期,冷型小麦穗部的磷含量较高,在不施肥、单施磷肥、单施氮肥和氮磷配施时分别比暖型小麦高23.28%、35.63%、4.25%和2.04%,平均高14.88%;但茎部的磷含量比暖型小麦低23.98%、10.30%、20.00%和17.58%,平均低17.76%;成熟期冷型小麦籽粒中的磷含量分别比暖型小麦高5.09%、4.47%-、2.74%和18.18%,平均高5.93%,其它器官磷含量均较低。施磷肥可以增加籽粒中的磷素含量,而施用氮肥有降低籽粒中磷素含量的趋势。开花期到成熟期冷型小麦磷转运效率均高于暖型小麦,冷型小麦的磷素收获指数较高。暖型小麦的磷素营养对氮素供应比较敏感。
Previous studies indicated that there were differences of the canopy temperature of among different wheat genotypes after anthesis.There were many reports about the physiological,anatomic and ecological characteristics of different genotypes wheat with lower and higher canopy temperature,but little about their phosphorus nutrition.The objective of this study was to probe the P concentration of different organs of genotypes with lower canopy temperature and higher canopy temperature.Field experiments were conducted from 2002 to 2004 at the Agricultural Experimental Station of Northwest AF University,Yangling,Shaanxi Province,China.It is a sub-humid area incident to drought.The genotypes（Xiaoyan 6 and Shaan 229） have lower canopy temperature,and named cold type wheat（CTW）.NR9405 and 9430 had higher canopy temperatures,o they weree belonged to warm type wheat（WTW）.Each genotype received four fertilizer treatments,CK（no fertilizer）,P fertilization（176.25 kg hm^2 P2O5）,N fertilization（237.0 kg hm^2 N）a,nd NP fertilization（176.25 kg hm^2 P2O5 plus 237.0 kg hm^2 N）.The experiments were laid out in a split-plot design with fertilization as main plots and genotypes as subplots.The treatments（variety × fertilizer） were factorial arranged in a 4×4 randomized complete block design.Each treatment was replicated three times.The area of each plot was 2.1 m2.The soil is classified as Eum-Orthic Anthrosol,equivalent to an Udic Haplustalf in the USDA system.The results indicated that the P concentration in ears of CTW were higher 23.28%,35.63%,4.25% and 2.04% than that of WTW in the CK,P,N and NP treatments respectively at anthesis.But the P concentrations in stem of CTW were lower 23.98%,10.30%,20.00% and 17.58% than that of WTW at anthesis.The P concentrations in grain of CTW were the higher 5.09%,4.47%,-2.74% and 18.18% than those of WTW in the CK,P,N and NP treatments respectively at maturity,but the P concentrations in other organs of CTW were lower than the WTW.So the CTW genotypes had higher capacity of P remobilise than WTW onesa,nd there were ones of higher P use efficiency.WTW were more sensitive to the N deficient.P fertilization could increase P concentration in the seed,but the N fertilization might have negative effects.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第4期947-951,共5页
Chinese Journal of Soil Science
基金
国家自然科学基金资助项目(30470333)
05西北农林科技大学博士科研启动费项目资助
关键词
冷型小麦
暖型小麦
器官
磷含量
Cold Type Wheat
Warm type wheat
Organ
Phosphorus concentration
