大理州核桃林不同绿色肥料施肥效果试验研究

对核桃林（产前期、初果期、盛果期）分别施用不同绿肥及施肥次数试验，结果表明：产前期以冠幅生长差异最显著，其次是树高，差异最小的是地径，以施混合肥及一年施3次的生长最好；初果期以冠幅生长和产量差异最显著，其次是地径，差异最小的是树高，以施混合施肥和一年施3次的生长最好；盛果期以产量差异最显著，其次是冠幅，差异最小的是地径和树高，施用混合肥产量每株年增产10．5kg。从外观上看，施用沼液和硼砂加硫酸锌肥料的，核桃林木叶片更绿、更大、更厚；不施肥和就地埋茅草、枯枝落叶的林木叶子变黄，而且落叶早。

Experimental Study on Fertilizer Effects of Different Green Fertilizers on Walnut Forests in Dali Prefecture

Fertilizer effects of different green fertilizers were studied by multiple tests on Walnut Forests in prenatal period,early fruit period,full fruit period.The results showed that,in the prenatal period,growth differences to crown is the most significant,followed by the tree height difference,the minimum difference is ground diameter,the best fertilization method is to fertilize mixed fertilization three times in a year;in the early fruit period,growth differences to crown and yield is the most significant,followed by the ground diameter difference,the minimum difference is tree height,the best fertilization method is to fertilize mixed fertilization three times in a year;in the full fruit period,growth differences to yield is the most significant,followed by the crown difference,the minimum difference is tree height and ground diameter,per plant increase 10.5kg yield by fertilizing mixed fertilization per year.Look from the exterior,application of biogas slurry and application of borax and zinc sulfate can improve the quality of leaves,leaf is more green,more large,thickening;no fertilizer and buried thatch,litter leaf color is yellow,and early deciduous.