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我区红壤性低产田面积约占总耕地面积的五分之二。由于红壤胶体性质所决定、土壤表现粘、酸、板、瘦、干等五大缺点,导致单季亩产水稻常在300斤右左,严重阻碍着我区农业生产的发展。据前人研究:腐植酸能改良土壤理化性能,提高肥效,刺激作物生长,但这方面的数据较少,特别是用于水稻方面的研究更不多见。为了进一步探索腐铵的肥效及改土机理,以及施用方法对水稻呼吸作用、光合作用以及酶的活性等方面的影响,以便为施用、推广提供理论依据。我所近三年来进行了这方面的试验,现得初步结果总结如下。试验的基本情况试验从1975年至1978年先后在代表性
My area red soil low yield field area accounts for about two-fifths of the total arable land. Due to the nature of the red soil colloids, the soil shows sticky, acid, plate, thin and dry five shortcomings, resulting in a single crop of rice per mu is often about 300 pounds, seriously hindered the development of agricultural production in our region. According to previous studies: humic acid can improve soil physical and chemical properties, improve fertilizer efficiency, stimulate crop growth, but less data in this area, especially for rice research more rare. In order to further explore the fertilizers and soil improvement mechanism of ammonium and the effects of application methods on respiration, photosynthesis and enzyme activity in rice so as to provide a theoretical basis for the application and promotion. In the past three years, I conducted experiments in this area and the preliminary results are summarized as follows. The basic conditions of the experiment from 1975 to 1978 has been representative