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一般认为粘土含量、阳离子代换量及有机物质含量少,地力难以提高的砂壤土水田上,为得到稳定高产,进行了有机物质连用试验。有机物质材料用厩肥和稻草,到现在已连用6年。试验结果是施用有机物区的糙米产量超过未施用区。糙米增产的主要因素是单位面积上的稻谷数增加。其内容是厩肥施用区穗数增加,稻草施用区是一穗粒数增加。然而,千粒重、结实率等因施用有机物质而降低。施用有机物质使产量增加,2期和3期的C、G、R显著提高了。施用有机物质增产糙米显著的足高温多照年,在光照不足年分有增产稻草的趋势。土壤的全碳及全氮含量由于连用有机物而增加,C/N比随施用量增加而增高。半纤维素、纤维素含量在厩肥,稻草两个区也随着施用量增加而增加,但木质素含量,大体是厩肥施用区高。按照BREMNER的方法,进行了各种形态氮素的分析,已糖胺态及氨基酸态氮素的分布比例,稻草施用区高一点,其他成分没看到差异。另外,磷含量在厩肥施用区Tvuog提取磷,Bray2法提取磷、无机磷、全磷含量均随着施用量的增加而增加。在稻草施用区全磷含量有所增加,其他形态的磷含量没表现出一定的趋势。施用厩肥、稻草后在土壤中碳素、氮素的残存率,厩肥施用区高。由于连用有机物质,明显看到土壤中各种成分的积累,水稻吸收养分数量也增加。因而,糙米产量增加10％左右,可见为了获得稳定高产,改善施肥是十分必要的。
Generally considered clay, cation exchange capacity and less organic matter content, difficult to improve the ground power of sandy loam paddy fields, in order to obtain stable and high yield, the organic matter used in conjunction. Organic manure material and straw, up to now have been used for six years. The test results show that the brown rice yield in the organic area exceeded the un-applied area. The main factor for increasing brown rice is the increase in the number of rice per unit area. The content is increased in the manure application area spike, straw application area is an increase in grains per spike. However, grain weight, seed setting rate and the like are reduced due to the application of organic substances. Organic matter was applied to increase yield, and C, G, R in phases 2 and 3 were significantly increased. The application of organic matter increased brown rice significantly high enough for many years, in the light of years there is a trend of increasing straw. Soil total carbon and total nitrogen content increased due to the use of organic matter, C / N ratio increased with the application rate increased. Hemicellulose and cellulose content also increased with the increase of application rate in both manure and straw areas, but the lignin content was generally higher in the manure application area. According to the method of BREMNER, the analysis of various forms of nitrogen was carried out. The distribution ratio of glycosaminoglycans and amino acid nitrogen was higher in rice straw application area, and no difference was observed in other components. In addition, phosphorus was extracted from Tvuog in manure application area, phosphorus was extracted from Bray2 method, and the content of inorganic phosphorus and total phosphorus increased with the increase of application rate. Total phosphorus content increased in the straw application area, while other forms of phosphorus did not show a certain trend. Manure, rice straw in the soil after the carbon, nitrogen residual rate, high manure application area. Due to the use of organic substances, it is obvious that the accumulation of various components in the soil increases the amount of nutrients absorbed by rice. Thus, brown rice production increased by about 10%, showing that in order to obtain stable and high yield, improve fertilization is very necessary.