Leaves and Accumulated Temperature Study of Summer Early-maturing Maize
Wu Zhen · Tianjin Agricultural Sciences · 2011
This paper studies the leaves numbers,accumulated temperature,growing period and appropriate topdressing period of the Luyuandan No.4,summer early-maturing maize,results showed that the total number of leaves was relatively stable,usually 17～18 films,days and accumulated of blade extended period temperature was an average about 8 d and 220 ℃,the whole growth period 83～85 d,accumulated temperature above 2 100 ℃.The best top-dressing period of 35.3 leaves that was suitable for top dressing period of leaf mean 17.6～52.9,soil fertility,high or basal fertilizer application,took appropriate range,low soil fertility or crop was growing weaker took the lower limit of suitable range.