氮磷钾对秋玉米农艺性状和植株养分的影响

Effects of Nitrogen-phosphorus-potassium on Agronomic Properties and Plant Nutrients of Southern Autumn Maize

在南方秋玉米上配施氮磷钾肥,探讨其对秋玉米农艺性状和植株养分的影响。结果表明,施氮极显著增加了秋玉米的株高、苞位高、茎粗、全氮量和全磷量,而极显著降低了植株的全钾量;施磷极显著增加秋玉米茎粗、全氮、全磷和全钾量,显著增加株高,而对苞位高无影响;施钾则极显著增加秋玉米植株全磷量,极显著降低株高、苞位高、全氮和全钾量,而对茎粗无影响。施氮和施磷能改善秋玉米的农艺性状,提高植株的养分含量。

The effects of different N-P-K levels on agronomic traits and nutrient contents of southern autumn maize were studied in a L4 （23）orthogonal experiment with 4 treatments： no fertilizer （CK） ,no potassium（with P and N）,no phosphorus（with N and K） and no nitrogen（with P and K）. The results showed that N significantly increased the plant height,spike height, stem diameter,total nitrogen content and total phosphorus content of the southern autumn maize, hut decreased significantly the total potassium content. P increased the plant height, stem diameter and the contents of total nitrogen, phosphorus and potassium significantly, hut had no effects on spike height. K significantly increased the total phosphorus content, decreased significantly the plant height, spike height, total nitrogen content and total potassium content, and had no effects on stem diameter. It was suggested that applying N and P fertilizer could improve the agronomic traits and the plant nutrient contents of southern autumn maize.