水稻覆草保墒旱作技术研究

Study on the Technique of Rice Dry Farming for Soil Moisture Conservation by Straw Mulch

探索了覆草保墒旱作的可行性及其配套的栽培技术。研究认为用覆盖 4 5 0g/m2 以上的稻、麦草取代覆膜旱作是可行的。覆草保墒旱作相应配套栽培技术 :改良、培肥土壤 ,增加土壤蓄保墒能力是前提 ;在选择抗 (耐 )旱性强的品种 (组合 )、培育素质好的旱育秧的基础上 ,增加栽插密度到 15穴 /m2 以上 ,每穴 2粒种子苗 ,施N18.75g/m2 ,N∶P∶K约 3∶1∶2 ,N肥底蘖肥后移、后期追肥比例增加到 30 %以上 ,可获较理想产量。

The feasibility of rice dry farming for soil moisture conservation by straw mulch and its technique had been studied. The results showed it is feasible that rice can be planted under dry farming with mulching 450g/m 2 straw instead of plastic film, and the relevant techinque for general yield as follow:introduction of rice variety with resistance or toterant to drought, growing vigorous seedlings in dry bed,increase of population with 15 hills/m 2 and 2 seedlings per hill,fertilizer application amount of N 18.15g/m 2,later dressing amount of N-fertilizer accounted for 30% above,and total N∶P∶K ratio:3∶1∶2.