以7年生灰枣为试材,设置不同磷肥处理,研究磷肥对灰枣生长性状及产量的影响,并计算各处理的磷肥农学效率.结果表明,在施肥设计水平范围内,土壤中适量减施氮肥、增施磷肥能提高灰枣叶鲜重、叶绿素a/b值、枣果纵横径及产量,其中处理P3、P4表现最好,与对照(CK)处理相比,分别增产41.35％、62.21％;磷肥农学利用效率分别为5.88％、6.21％,当磷肥施用量超过428.4 kg/hm2(P5)时,灰枣产量及磷肥农学效率均明显下降.从灰枣增产效果以及肥料资源高效利用等综合考虑,新郑地区灰枣的磷肥合理施用量为357 kg/hm2(P4),氮磷钾合理配比约为11:7:1.

Study was conducted on 6 physiological indexes of Katy Apricot grown in the greenhouse,with Katy Apricot leaf as experiment materials and those grown in the open field as the CK in Henan.The results showed that: in the greenhouse MDA content and CAT activity increased and respectively reached their maximum value 5.054 0 μmol·g-1 and 310.072 5 U·g-1·min-1 at fruit growth stage,which was 39.6% and 36.43% higher than those from the open field.The soluble sugar content,the soluble protein content,POD and SOD activity in greenhouse were lower than those in the open field.The soluble sugar content reached its maximun value 3.464 3% at the core period,which was 28.60% lower than that in the open field.POD and SOD activity respectively reached their maxium value 249.103 6 U·g-1 and 110.875 0 U·g-1·min-1 which was respectively 30.10% and its 73.73% lower than that in the open field.The soluble protein content showed different variable pattern and reached minimum value 14.0811 mg · g-1 at the young fruit period,which was 76.27% lower than that in the open field,and at that time the maximum value in the open field appeared.All the above mentioned data reached uttermost significant level.The various parts of the greenhouse were also compared,and the results showed that MDA content,the soluble sugar content,the soluble protein content,POD and SOD activity were all higher in the southern part than in the northern and central parts.However,CAT activity in the southern part was lower than in the northern part of the greenhouse.