施肥对饲料稗生育和产量的影响

EFFECTS OF FERTILIZING ON THE GROWTH, DEVELOPMENT AND YIELD OF BARNYARDGASS(ECHINOCHLOA CRUSGALLI)

对饲料稗两年试验的结果表明,每公顷基施75公斤纯氮时,割草田可比对照增产干草4.3吨,增产62％;收籽田可比对照增产干草2.4吨,增产种子0.89吨,分别增产34.8％和33.1％。在基施氮肥的同时再配合基施磷肥时,割草田可增产干草9.55％;收籽田可增产种子7.8％。配合基施钾肥无明显效果。

The results of two year's field experiments of the barnyardgrass showes that, when the application of N—fertilizer reached 75kg/ha of pure N,the yield of hay of the grass then increased 4.3 tons per ha by 62% in comparison with the control field,if for seed,the yields of hay and seed of the grass increased 2.4 tons and 0.89tons per ha increasing by 34.8% and 33.1% respectively in comparison with the control one. When the basic application of nitrogen fertolizer dressed with application of phosphorus fertilizer,then the yield of hay of barnyardgrass increased 9.5% on the field for hay;and that of seed of the grass increased by. 78% on the field for seed. But the basic application of nitrogen and phosphorus fertilizer dressed with application of potassium showes no significant effect on yield.