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不久以前,在菲律宾参加国际水稻研究所成立二十周年纪念活动的各国农业专家,参观了这里的一项实验:在一块约二亩的水田里,种植有不同条件下生长的同一品种的水稻。其中,长得最茁壮喜人的是采用宽窄行插秧的稻田,在宽行间生长红萍,作为水稻的肥料。稻田前的一个木牌上写有实验的成果:在一季水稻生长期间,采用这种办法可以收四次到五次红萍,相当于每公顷施一百公斤的硫酸铵肥料。生长红萍的稻田不施用其他氮肥,和不施红萍的田地相比,平均可以每公顷增产稻谷二吨。
Not long ago, agricultural experts from various countries who participated in the celebration of the twentieth anniversary of the International Rice Research Institute in the Philippines visited an experiment here. In a paddy field of about two acres, paddy rice of the same variety grown under different conditions was planted. Among them, the most promising is the rice paddies planted in broad and narrow rows, and the Hongping is grown between wide rows as a fertilizer for rice. A wooden signboard in front of the paddy field contains experimental results: During this season of rice growth, this method can be applied four to five times, equivalent to 100 kg of ammonium sulphate fertilizer per hectare. The paddy field that grows Hongping does not use other nitrogenous fertilizers, and can increase the yield of rice by 2 tons per hectare on average compared with the field without applying Hongping.