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要夺取棉花高产,必须做到壮苗早发。就我县而言,影响壮苗早发的诸因素中,土壤温度起着决定作用。近两年来,我们采用小高垅植棉法,改善了棉田温度条件,争得了全苗、早苗、壮苗。据测定,小高垅比平垅地表面积增加12%,这就相应地扩大了受光面积。4月20日至5月3日,小高垅5厘米土层日子均地温比平垅提高0.7℃。小高垅每天内地温变幅较大,而且浇水后比平
To seize cotton high yield, must be strong early seedlings. In my county, the factors that affect early seedling growth, soil temperature plays a decisive role. In the past two years, we have adopted the method of planting small cotton plants to improve the temperature conditions in cotton fields and won the full seedlings, early seedlings and strong seedlings. It has been determined that small highland flat surface area increased by 12%, which accordingly expanded the light receiving area. From April 20 to May 3, the average daily temperature of 5 cm soil layer in small highland rice increased by 0.7 ℃ than that of flat soil. Small high-temperature changes in the larger daily temperature, and water than the flat