不同抗寒剂浸种与叶面喷施对早稻秧苗素质及产量的影响

Effects of the methods using five cold-resistant agents used in soaking seeds and foliar spraying on the quality of early rice seedlings and yield

以中早39为试验材料,采用大田小区试验,研究5种抗寒剂(脱落酸、碧护、复硝酚钠、烯效唑、多效唑)浸种与叶面喷施对早稻秧苗素质及产量的影响。结果表明:相比对照(清水浸种),脱落酸浸种与叶面喷施、多效唑浸种与叶面喷施、烯效唑浸种与叶面喷施、碧护浸种、复硝酚钠叶面喷施处理的苗高、叶鞘长分别降低了7.05%~23.94%、1.92%~32.48%,绿叶数、总根数、白根数分别增加了1.02%~56.35%、4.59%~18.77%、12.41%~43.65%;脱落酸浸种、烯效唑叶面喷施处理提高了水稻的实粒数与千粒质量;脱落酸叶面喷施、碧护叶面喷施处理增加了有效穗数与千粒质量;各处理的产量较对照的差异均不显著,其中以脱落酸浸种处理的产量最高,较对照的提高27.88%;烯效唑浸种处理的次之;脱落酸叶面喷施处理、碧护浸种与叶面喷施处理的产量较对照的提高了4.82%~11.11%,可在保障水稻丰产中应用。

Taking Zhongzao 39 as the test material,we investigated the effects of five cold-resistant agents(abscisic acid,Bihu,sodium nitrophenolate,uniconazole,paclobutrazol)used in soaking seeds and foliar application on the seedling quality and yield of early rice seedlings.The results showed that using the soaking and foliar spraying with abscisic acid,paclobutrazol,uniconazole,soaking with Bihu,and foliar spraying with sodium nitrophenolate,the seedling height and the length of leaf sheath decreased by 7.05%-23.94%and 1.92%-32.48%,respectively.The number of green leaves,total roots and white roots increased by 1.02%-56.35%,4.59%-18.77%and 12.41%-43.65%,respectively.Abscisic acid soaking seeds and uniconazole foliar spray treatment increased the grains number and the 1000-grain weight.The abscisic acid foliar spray and Bihu spray treatment increased the effective panicle number and the 1000-grain weight.In comparison with the control,the yield of the treatment with abscisic acid soaking was 27.88%higher than that of the control,followed by the soaking seeds treatment of uniconazole.And,the yield of abscisic acid foliar spray treatment,the Bihu soaking and foliar spraying increased by 4.82%-11.11%.The five cold-resistant agents can be applied in enhencing high yield of rice.