旱地小麦因墒播种方式研究

A Study on Drought-resistant Sowing Pattern of Drylandland Winter Wheat

在播种期严重干旱的1989、1991、1993和1994年,对三种播种方式的效应进行了系统研究.结果表明,0—20cm土壤含水量在11%—15.4%的范围内,抢墒播种,小麦出苗早,出苗率可达90%以上,苗情发育较好,产量最高,亩产可达127.3—310kg;0—20cm土壤含水量在8%以下时,干旱寄种,比雨后播种出苗早,出苗率可达70%以上,苗情稍优,亩产可达36.2—295.2kg,位居第二位;雨后播种.出苗最晚,产量最低,亩产只有34.5—264.2kg.

The effects of three sowing patterns were studied in the year 1989. 1991. 1993 ond 1994 in Which the sowing period wos serious dry. The experimental results indicate that early sowing in good time when the soil moisture in 0 - 20 cm soil layer is 11% to 15. 4% can significantly improve seedling growth and development and increase the yield. The seedling emergence rate is over 90% and the yield is 127. 3 to 310kg per mu. The seedling emergence time,growth and development and the yield in the sowing pattern of checking seeds at the soil when the soil moisture in 0-20cm soil layer is below 8% are all superior to the pattern of sowing after raining, The seedling emergence rate is over70% and the yield is 36. 2 to 293. 2kg per mu which is the second of the three sowing patterns. The yield of the pattern of sowing after raining is the lowest whicl is only 34. 5 to 264. 2kg per mu.