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1 播种要及时碾压第1次在播种前进行,因整地跑墒快,表土易干,如土壤不均匀,会影响出苗,碾压能补偿精细整环节。第2次在谷芽刚要出土时进行,以防跑墒,也可避免高温烧芽。第3次在幼苗两个叶片时进行,能起到提墒防旱,蹲苗、保苗、壮秆作用。常言道:“播种碾三次,无两行泛青”。但也要视气候,土壤环境进行,在下湿地、粘重土不宜多碾压,以防盐分上升和促成土壤板结。碾压不仅保墒增温,更有利于幼根分生发育下扎。
1 Sowing timely rolling first carried out before sowing, due to soil moisture quickly running, topsoil easy, such as uneven soil, will affect the emergence, rolling can compensate for fine links. The second time in the unearthed cereal bud to be carried out to prevent running moisture, but also to avoid high temperature burning buds. The third time when the two leaves of seedlings, can play to mention moisture drought, squat seedlings, seedlings, strong stalk effect. As the saying goes: “Sowing grind three times, no two lines pan-green.” But also depending on the climate, the soil environment, in wetlands, sticky soil should not be more laminated, to prevent salt rise and promote soil compaction. Rolling is not only moisturizing warming, more conducive to the development of young root twining.