稀落谷长秧龄对机插水稻秧苗素质、栽插质量及产量的影响

Effects of Long Seedling Age and Thin Sowing on Seedling Quality,Planting Quality and Yield of Machine Transplanted Rice

以苏北地区常规粳稻苏秀867为试验材料,研究了稀落谷不同长秧龄和常规落谷常规秧龄两种育秧方式对水稻秧苗素质、栽插质量和产量的影响。结果表明,与秧龄25 d常规落谷相比,稀落谷秧龄25~35 d的处理秧苗素质有所提高,移栽后发根速度快,缓苗期短;在栽插基本苗一定的情况下,稀落谷的处理随着秧龄的增加,水稻产量表现出先升高后降低的趋势,其中秧龄30 d稀落谷的处理产量最高,其次为秧龄35 d稀落谷的处理和秧龄25 d稀落谷的处理,产量最低的是秧龄40 d稀落谷的处理。总体上,稀落谷秧龄在25~35 d之间时秧苗素质较高,产量较秧龄25 d常规落谷处理增产57.0~130.5 kg/hm^2,说明该品种稀落谷条件下秧龄弹性较大,适当延长秧龄(30~35 d)更有利于获得高产。

A field experiment was carried out to compare the difference between long seedling age of thin sowing and conventional seedling age of regular sowing on seedling quality,transplanting quantity and yield of machine transplanted rice,using conventional japonica rice Suxiu 867 as material.The results showed that,compared with the conventional seedling age and regular sowing,the seedling quality of the long seedling age and thin sowing treatments(25 d,30 d,35 d)was improved,the rooting speed was fast after transplanting and the revival time was short.Under the condition of the same basic seedlings,the yield showed a trend of increasing first and then decreasing with the seedling age increase.Among them,the yield of 30 d seedling age with thin sowing treatment was the highest,followed by 35 d and 25 d seedling age with thin sowing treatment,40 d seedling age with thin sowing treatment was the lowest.In general,the seedlings quality of 25~35 d seedling age with thin sowing was relatively good,and the yield was increased by 57.0~130.5 kg/hm^2 compared to the control.The results indicated that this variety has greater elasticity of seedling age,proper prolongation of seedling age(30~35 d)is more favorable for obtaining high yield.