不同施肥模式对马铃薯生长、产量及品质的影响OA

Green intelligent fertilizer(GIF)is a new type of fertilizer with precise matching of nutrients produced by green manufacturing process using big data intelligent algorithm for targeted directional design formula.In order to solve the problems of resource waste and non-point source pollution caused by excessive application of fertilizers,this experiment explored a green high-value planting mode suitable for the southwest region.Three experimental sites were set up in Yunnan Province to compare and analyze the effects of GIF treatment and conventional fertilization treatment(CK)on potato growth index,quality,yield and profit.GIF showed a significant growth promoting effect in the key growth period of potato.The plant height was significantly increased by 4.30%-5.55%compared with CK during the tuber bulking,and the SPAD value was significantly increased by 8.32%-10.94%during the tuber bulking.GIF significantly increased the root volume of Gusheng Village(site 1)by 49.59%.In terms of tuber quality,the vitamin C and crude protein contents of GIF were significantly increased by 15.91%and 6.78%,respectively,but the reducing sugar content was significantly reduced by 14.29%.In terms of yield and benefit,GIF showed a very significant increase in yield and profit compared with CK at the three site.The yield increased by 11.23%-19.48%,and the highest profit increased by 48.05%.Correlation analysis showed that yield was significantly positively correlated with root volume,marketable tuber percentage,vitamin C and protein content.In summary,the GIF model reduces the input of phosphate fertilizer by 35%-45%compared with the conventional model under the premise of basically the same nitrogen input through the scientific ratio of nutrients and the directional supplement of medium and trace elements(Ca,Mg).For'Qingshu 9'in this area,the recommended total nutrient input is N 202.5-289.5 kg/ha,P2O5 98.7-121.5 kg/ha and K2O 216.0-406.8 kg/ha.For'Xuanshu 2',it is recom-mended to be approximately N 336.0 kg/ha,P2O5 192.0 kg/ha and K2O 456.0 kg/ha.The scheme realizes the coordinated development of"low input,high output and excellent quality",and has important application value in similar ecological areas.