| Rainy area of west China is damp climate in character in western region. This area enjoys rich bamboo forest resource. While the forest land soil acidification is serious as a result of heavy raining. Slag fertilizer is high efficient, compound and sustained-release. It is also the conditioner of acid soil. The study of bamboo forest slag fertilizer’s reasonable use in rainy area has practical significance in many ways. It can improve soil physical and chemical properties and increase productivity and output; it can increase fertilizer use efficiency and reduce labor intensity of frequent fertilization; it can also reduce environment pressure of slag and relief resource waste.This research chooses Phyllostachys bissetii, the main economic bamboo species in Rainy area of Western China, as the research object. It carries out a research of fertilization formula and consumption of slag fertilizer for bamboo on the basis of regional bamboo forest nutrient level and growth states correlation. This experiment adopts 2-factor-4-level randomized block design and fertilizes two kind of slag fertilizer for bamboo forest which formulas are different (KZF, N:P2O5:K2O=1:0.67:0.48). Every formula has 4 fertilization levels, comparing with no-fertilizer and common fertilizers-2 dosage with same formula (PTF). This experiment can calculate the best fertilizing amount and the new bamboo maximum output.. The author contrastively analyses the slag fertilizer and common fertilizer’s effect to soil physical properties, chemical properties and biological activity. This research provides fundamental basis to the slag fertilizer for bamboo’s popularization and application in Rainy area of Western China. The main results are as follows:(1) When KZF is between 0.613 t·hm-2 and 1.225 t·m-2, the improvement effect to Phyllostachys bissetii forest soil physical properties is the best. KZF has the same influence with common fertilizer to soil water retention and water supply. It has better effect to reduce soil stickiness and improve soil aeration.When KZF is 1.225 t·hm-2 to Phyllostachys bissetii, the comprehensive improvement effect to soil Ph value, organic content, nitrogen, phosphorus, potassium and silicon nutrition is the best.(2) After 3 years of KZFA fertilizing, forest soil manganese content is below Sichuan Basin average. Copper, zinc, lead and cadmium content meet Soil Environment Quality Standards (GB15618-1995) level one, which have no hazard and pollution to plants and soil. Slag fertilizer can be extended application in Ya’an area, while cadmium pollution must be monitored seriously during the fertilizing process.(3) After 3 years of KZFA fertilizing, forest soil physical and chemical property changes have different levels of impacts to soil enzyme activity. The activity of soil enzymes in summer are higher than winter, so the influence of KZF to soil enzymes is mainly in summer. To soil oxidoreductase, there is a little influence to catalase activity in a low level.forever,there is a restrain to peroxidase in a high level. So, there is a significant effect to soil oxidoreductase, when it is at 3 level.KZF has a significant effect in hydrolase exclude phosphatase、sucrase and urease activity, but high 3、4 level have apparent restrain to phosphatase and sucrose activity. Just in 2 level, hydrolase used of KZF reach to the max. |
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