PP_(333)不同施用方式及浓度对早实核桃生长发育的比较研究

Comparative Research on Influcences of Different Application Methods and Concentrations of PP_(333) on the Growth and Development of Walnut Trees

结合PP333，不同施用方式及浓度，以‘川早’系列早实杂交后代为试材，分别进行早实核桃叶喷、输液和土施3种处理，分析不同浓度和施用方式对早实核桃单株冠幅、梢长、比叶重、坐果率、落果率以及单位投影面积产量的影响。进而筛选能抑制核桃营养生长、提高产量的PE。施用方式及浓度。结果表明：（1）PP。不同施用方式处理间，叶喷和输液处理当年可显著抑制早实核桃营养生长，提高单位投影面积产量，土施处理后当年抑制效果不显著；（2）不同施用方式及浓度处理间，PP粥对早实核桃坐果率和结果率均无显著影响；（3）叶喷方式下，Y1～Y5处理单位投影面积产量均高于对照，其中Y5处理增幅最大，较ck高14．6％；S输液方式下，S1-S5处理单位面积产量均高于对照，其中Y5增幅最大，较ck高13．5％；土施方式下，Y5可提高单位面积产量6．3g·m^-2，较ck高5．3％。

Combining different use modes and concentrations of PP333 ,and taking ＇ Chuanzao＇ series pre- cocious offsprings as test materials, three kinds of treatments were conducted on precocious walnut trees, including leaf spraying, infusion, and soil application. Analysis was made of influences of different applica- tion methods and different concentrations on walnut tree crown, twig length, leaf weight, fruit setting rate, fruit dropping rate and unit projected area yield. The aim was to screen the suitable application mode and concentration of PP333,which could inhibit the walnut vegetative growth and increase the walnut production.