【摘要】 用盆栽试验研究京郊缺锰潮土(DTPA-Mn=3.54ppm Mn,DTPA-Zn=0.55ppm Zn)上生长的冬小麦的缺锰症及施用锰、锌肥对冬小麦的生长发育、籽粒产量、品质和营养价值等方面的影响。结果表明,施锰增产,施锌减产;冬小麦籽粒对锰肥用量的效应方程为Y=16.4+0.160x～0.0135x~2,F=1.45,n=28,使冬小麦减产的养分指标临界值为,籽粒锌浓度>106ppm,锰浓度<15.5ppm、N/Zn<327,P/Zn<49.6,K/Zn<33.6。施锰提高土壤有效锰含量、植株锰浓度和叶片叶绿素含量,促使籽粒中的养分平衡;锰锌合施则对冬小麦籽粒品质和营养价值有良好效应。更多还原

【Abstract】 Dealing with the problem of micronutrient deficiencies present on winter wheat crops in some areas of China in recent years, studied the effects of Mn & Zn fertilizers on growth, grain yield, quility and nutritional value of winter wheat by using the methods of pot experiments in greenhouse. The soil used in the experiment is a Mn defficient （DTPA-Mn=3.54ppm） calcareous alluvial soil collecded at Changyang Farm in the surbarban of Beijing. Using NPK as base fertilizers （with N 0.25 g, P₂O₅ 0.20g, K₂O 0.15g per kg soil respectively）, 2 levels of Mn （ 0 and 39 ppm Mn） and 2 levels of Zn （0 and 27 ppm Zn） was applied in the first design, the following design was carried on with only one level of Zn （27 ppm Zn） and 7 levels of Mn （0, 13, 26, 39, 52, 78, 104 ppm Mn resp. ）. The results show that:（1） The nutrition defficiency on winter wheat crops in Changyang Farm is due to the lower contents of soil available Mn.（2） Grain yields and dry matter production of winter wheat was greatly Grain increased and decreased by the application of Mn and Zn fertilizer respectively, On the basis of Zn fertilization, the effect equation of the grain yields versus Mn fertilizer is: Y=16.4+0.160X-0.0135X², F=1.45, n=28.（3） The critical nutrient indexes in the grains which rela ted to graet decreasing of grain yields of the winter wheat is as follows: Zn concentration>106 ppm; Mn concentration<15.5 ppm; N/Zn ratio<327; P/Zn ratio<49.6 and K/Zn ratio< 33.6. Application of Mn fertilizer favourably adjusted nutritient balance of the grains and increased the number of grains per ear and the number of ears per pot. While application of Zn fertilizer increased the number of sterile spikelest per ear.（4） Mn fertilization could also increase the contents of soil available Mn and chlorophyll contents in crop leaves. However, Mn combined with Zn fertilizers had a favourable effect on grain quility and nutritive values of the products by increasing the index of amino-acid scores and various amino acid contents of its crude protein.更多还原