Research on Site-Specific Nitrogen Management Technology in Super Rice "Yongyou 12"
Rice variety "Yongyou 12" has high yield potential,but it has been more and more depending on nitrogen fertilizer year by year.In order to reduce the amount of nitrogen used in "Yongyou 12" and improve the utilization rate of nitrogen,Yongyou 12 was treated with different levels of nitrogen,and SPAD chlorophyll meter was used to trace changes in the leaf color in "Yongyou 12".The effect of different nitrogen fertilizer on the leaf color and final yield also was investigated.The results showed that 300～360 kg/hm2 of nitrogen application based on the yield of 13.5 t/hm2 was appropriate.The correlation equation between rice leaf SPAD values and rice yield was created,and 40 and 49 were the nitrogen fertilizer application critical value of SPAD in"Yongyou 12" in early tillering stage and panicle initiation stage,respectively.We also developed the site-specific nitrogen management technology for "Yongyou 12" with the yield over 13.5 t/hm2.
Yongyou 12SPAD valuessuper high yieldnitrogen management
NETL
NSTL
万方数据
维普
