多效唑和矮壮素对核桃生长发育的影响

Effects of PP333 and CCC on Growth and Development of Walnut

[目的]筛选能抑制核桃营养生长、提高核桃产量的生长调节剂的种类与浓度。[方法]以云新早实核桃A、B、C、D4个品系为试材，对PP333和CCC2种生长抑制剂设置不同浓度进行核桃叶面喷施，分析PP333，和CCC不同浓度对核桃单果重、枝条充实度、单位芽数和单株核桃果数的影响。[结果]CCC喷施浓度为300mg／L时可显著降低核桃单果重量；施用PP333可显著提高坐果数量和单果重而增加单株产量，以500～1000ms／L喷施效果较好；喷施不同浓度P只。单位芽个数并无明显差异；喷施50mg／LCCC时，单位芽个数比对照降低18％；喷施100mg／LCCC时，枝条比重（1175kg／m3）较CK高13．9％；PP333，浓度为500mg／L时，枝条比重明显低于CK，其余各处理下，枝条比重差异不明显。[结论]该研究为生长调节剂在核桃上的应用提供指导。

[ Objective] The study aimed to screen the kinds and conch, of plant growth regulators that could control the nutrition growth and increase the yield of walnut. [ Method] With 4 Yunxin precocious walnut lines of A, B, C, D as the tested materials, 2 plant growth regula- tors of CCC and PP333 were set up with different concn, to spray the leaves of walnut and the effect of CCC and PP333 with different concn, on the single nut weight, wattle density, unit bud quantity and nut number per plant of walnut. [ Result] The single nut weight was obviously de- creased by spraying 300 mg/L CCC. The nut-setting quantity and single nut weight were increased by spraying PP333 and its concn, of 500 - 1 000 mg/L could get better spraying effect. The difference on the unit bud quantity wasn＇ t obvious by spraying PP333 with different concn. and it was 18% lower than that of CK when spraying 50 mg/L CCC. The wattle specific weight was I 175 kg/m3 when spraying 100 mg/L CCC, being 13.9% than that of CK higher. The wattle specific weight was obviously lower than the CK when spraying 500 mg/L PP333 and its difference on among other treatments wasn＇ t obvious. [ Conclusion] This study provided the guidance for the application of plant growth regu- lators in walnut.