| Increasing fertilizers, irrigation, fertilizer and other inputs is the main reason for the cropand woods continuous increase in the North China Plain. But in recent years, blindly increasingmore fertilizer is not only did not effectively increase the crop yield, but also sharpened theincreasingly serious ecological environment problems. At the same time, with the expansion ofpoplar plantation area, production and operation management presents many problems,especially the problems for fertilizer. Producers only pay attention to the forest products harvest,do not attach importance to nutrient timely return, make poplar growth conditions deteriorated,which restricts the development of poplar plantation. How to effectively applied fertilizers toslow the increasingly serious pollution, increase the production of crops and woods, is the keyto the sustainable development of agriculture and forestry in the region.The study area is located in Yucheng County. With the help of mathematical statistics theoryand geographic information system technology, carry out the evaluation of nitrogen, phosphorusand potassium balance, to researchthe nutrient balance of distribution, analysis of various nutrientinput/output and soil basic properties, soil type, etc in Agro-forestry ecosystem nutrient balanceinfluence. The goal was to analysis Agro-forestry ecosystem nutrient structure of input/output,understand the advantages and disadvantages of nutrient resource allocation, provide thescientific basis for nutrient resources high efficiency and reasonable application.Research has achieved the main conclusions are as follows:1. Through the practical sample acquisition Agro-forestry ecosystem nutrient propertyvalues, then spatial prediction of the nutrient status. From the results of spatial prediction,nitrogen nutrients mostly in1-1.5g/kg. From the Citywide, nitrogen deficiency is relativelyserious area mainly distributed in FangSi town, ShiZongban town, JuZhen town. Most of theregional phosphorus in0.9g/kg-1.8g/kg within range, phosphorus content is the lowest in thenorth part of Xindian town, the highest area appears in the junction of FangSi town andShiZongban town. Most of the regional Potassium in15g/kg-18g/kg within range, Potassiumcontent was the lowest in the JuZhen town, the highest area appear in the XinDian town,XinZhai town, ShiZongban town, ShiLiwang town, LiTun town.2. In2008-2009in production as an example the quantitative research Yucheng CountyAgro-forestry ecosystem N, P, K nutrient balance characteristics. Study found that: First, Nliteracy points overall is in surplus state, but there are significant regional differences, deficitarea is mainly distributed in the northeast and southwest. Farmland was a certain amount of Nin the overweight, and all regions are quite different in the woodland N applied. Second, P literacy points overall is in surplus state, and surplus amount is larger, but there are certainregional differences. The actual rate is much higher than allow balance surplus balance deficitrate, considerably more than the reasonable scope. Third, K literacy points overall is in surplusstate, however, some regional potassium in a deficit state, deficit area mainly distributed in thesouthwest and southeast of Yucheng County, Farmland potassium balance surplus rate,potassium not get reasonable efficient use, a part of the forest in deficit potassium state, need tostrengthen management, so as to achieve the purpose of sustainable management.3. Driving force analysis on the factors that affect various types of nutrient balance, andthe results indicate that: first, chemical fertilizer and organic fertilizer factors influence factorswere Agro-forestry ecosystem nitrogen nutrient balance of ecological system main factors.Second, the main driving force of phosphorus nutrient balance is soil viscous grain content.Third, soil viscous grain content and pH is affected soil k balance's main ingredient. Analysis ofthe driving factors, to a certain extent contribute to the efficient use of resources.4. In order to avoid ecological and environmental problems caused by the irrationalfertilization, improve the capacity of sustainable development of agriculture–forestry,combining all kinds of a distribution and balanced distribution situation, we can dividedYucheng County Agro-forestry ecosystem nitrogen nutrient meticulous into8kinds area;phosphorus is divided into6kinds area of nutrients, potassium is divided into8kinds area.Partition management to use reasonable nutrient resource, reduce the production cost, theenvironment pollution caused by excessive fertilizer application of harm. |
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