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我们在双交42玉米样板田上,于六月上旬拔节期每亩穴施羊粪500公斤、硝酸铵15公斤、过磷酸钙5公斤的混合肥料,到抽雄前7—10天又穴施了穗肥,每亩5、10、15公斤,施后第二天灌水.穗肥的效果,因施用量不同而有差异.1.穗肥用量与植株生长速度:比较观察结果,施穗肥的植株生长较迅速,并与施用量成正相关.据我们测定,七月一日至廿日20天平均生长速度:亩施硝酸铵5公斤,平均每日茎秆伸长2.8厘米;亩施10公斤,日伸长3.8厘米;
In the field of double-cross 42 corn, we applied 500 kg of sheep manure, 15 kg of ammonium nitrate and 5 kg of superphosphate fertilizer per acre at jointing stage in early June to spike at 7-10 days before tasseling Fertilizer, 5,10,15 kg per acre, irrigation the next day after fertilization.Effects of panicle spike, due to different application rates are different.First, the amount of spike fertilizer and plant growth rate: a comparison of the observed results, Grow rapidly, and with the application of a positive correlation.According to our determination, from July 1 to 20 20 days average growth rate: 5 acres of ammonium nitrate, the average daily stem elongation of 2.8 cm; Mushi Shi 10 kg, Day elongation 3.8 cm;