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我县地处黑龙港流域,土地干旱瘠薄,旱地占65.6%,长期以来产量低。抓好旱地生产,是我县农业生产的战略问题之一。产量低的主要原因是对自然降雨没有充分利用。目前各乡、村对自然降雨利用程度相差很大。利用较好的城关、梨元屯片,1毫米雨量生产粮食0.4—0.6公斤;利用较差的候贯、章台和七级片,仅0.15—0.25公斤;全县平均仅有0.25公斤左右。如果全县把1毫米自然降雨平均生产粮食提高到0.5公斤左右,那么旱地粮食生产就可以翻番。自然降雨未能充分利用的原因主要有3条:①土壤瘠薄限制了自然降雨的利用;②耕作粗放,浪费了降雨;③全年降雨不均与作物需水不相一致,不能被作物直接利用。
My county is located in the Heilongjiang River Basin, arid barren land, dry land accounted for 65.6%, long-term low yield. Grasp the dry land production, is one of the strategic issues of agricultural production in our county. The main reason for the low output is the lack of full use of natural rainfall. At present, the use of natural rainfall by villages and villages varies greatly. The use of better Chengguan, pear Yuancun film, 1 millimeter of rainfall to produce grain 0.4-0.6 kg; use less favorable, Zhang Tai and seven films, only 0.15-0.25 kg; the county average only about 0.25 kg. If the county raises the average grain yield of 1 millimeter of natural rainfall to about 0.5 kg, the dry food production in the dry land can be doubled. There are mainly three reasons why natural rainfall is not fully utilized: ① soil infertility limits the use of natural rainfall; ② extensive cultivation and wasted rainfall; ③ uneven rainfall throughout the year is not consistent with crop water use and can not be directly used by crops .