摘要
为探讨小麦种植中沼液合适的施用方法,以猪场沼液作为肥源,常规化学施肥为对照,在确定基肥和追肥两个施用时期及沼液总施用量为600 t/hm2的条件下,研究了前轻后重法(T1)、均衡施用法(T2)、前重后轻法(T3)、一次基施法(T4) 4种沼液运筹方法对小麦生长及产量的影响。结果表明:小麦营养生长量及叶片光合特性表现一致,为T2=T3> T1> T4> CK; T1—T4处理分别比CK增产2. 6%、8. 9%、6. 8%和4. 3%,但千粒重分别下降9. 6%、6. 2%、6. 8%和2. 1%,熟期分别延迟7—8 d、4—5 d、3—4 d和0—1 d。沼液追施量的增加易导致小麦生长旺盛、贪青迟熟,在小麦种植中推荐使用"前重后轻法"施用沼液,应重施基肥(总量2/3左右),适量追肥(总量1/3左右)。
In order to explore the suitable application method of biogas slurry in wheat planting,taking the biogas slurry of pig farm as fertilizer source and conventional chemical fertilization as control,4 methods of biogas slurry management were studied under the conditions of determining the application periods of base fertilizer and top-dressing and the total application amount of biogas slurry as 600 t/hm2. The results showed that the vegetative growth of wheat and photosynthetic characteristics of leaves were consistent,with T2 = T3 > T1 > T4 > CK.Compared with CK,the yields of T1—T4 treatments increased by 2. 6%,8. 9%,6. 8% and 4. 3%,but the1 000-grain weight decreased by 9. 6%,6. 2%,6. 8% and 2. 1%,and the maturity delayed by 7—8 d,4—5 d,3—4 d and 0—1 d,respectively. Increasing the amount of biogas slurry top-dressing could easily lead to vigorous growth of wheat,greening and late maturity. In wheat planting,it was recommended to apply biogas slurry with"more before and less after"method. Base fertilizer should be applied more( about 2/3 of the total amount) and top-dressing should be applied appropriately( about 1 /3 of the total amount).
引文
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