宁夏黄河灌区盐碱地不同苜蓿品种种植试验

为选择更为耐盐的苜蓿Medicago sative品种,在宁夏黄河灌区0～60 cm土层全盐含量为0.47%的盐碱地种植8个苜蓿品种,并进行了试验田土壤盐分含量、参试品种物候期、株高、分枝数、主根长、侧根数、出苗率、保苗率、苗期至翌年返青期不同阶段田间苜蓿株数、鲜草产量、干草产量等测定.结果表明:宁苜1号齐苗率、保苗率、成株期田间株数和鲜、干草产量显著高于其他品种,是更具耐盐碱的苜蓿品种.同时阐明:苜蓿在盐碱地种植后的出苗率和保苗率是衡量品种耐盐碱性的一个重要指标.

A growth experiment of different alfalfa cultivars in the saline soil of irrigated areas of Yellow River in Ningxia province

For the sake of choosing salt enduring cultivars of alfalfa,8 alfalfa cultivars were planted in the saline soil containing 0.47% salt in Yellow River irrigated areas.In this trail the following items had been determined,those were: the salt concentration of soil;phenological phases;height;ramifying quantity;length of principal roots;quantity of lateral roots;emergence rate;survival rate;quantity of alfalfa from juvenile to reviving period in the field at different stages next year;and the yield of green and hay.The results indicated that the cu."Ningxia No 1" was more superior than other trailed cultivars on the rate of emergence and survival,quantity of field sprouts and green/hay fields.The initial conclusion was that the new alfalfa cultivars "Ningxia No1" was a better salt resistant cultivar which could be planted in the most parts of saline soil in Yellow River irrigated areas in Ningxia.The result also indicated that the emergence rate and survival rate are two important indexes to measure the salt resistance of alfalfa cultivars.