论文部分内容阅读
在温室盆栽试验条件下,研究不同添加剂处理的花生秸秆腐解产物对土壤pH、生物学性质以及花生苗期生长状况的影响。试验设置5%碱渣处理秸秆腐解产物配施化肥(A)、3%FeSO4处理秸秆腐解产物配施化肥(F)、5%碱渣和3%FeSO4处理秸秆腐解产物配施化肥(AF)、无添加剂处理秸秆腐解产物配施化肥(N)、单施化肥(NPK)和不施肥对照(CK)等6个处理,于花生苗期采样测定土壤pH、微生物生物量和酶活性的变化,观测花生苗生物量和株高的生长状况。结果显示,单施化肥容易引起红壤酸化加剧,导致土壤生物活性下降。化肥配施碱渣和化肥配施FeSO4两个处理的秸秆腐解产物能够有效减缓红壤酸化;碱渣处理秸秆腐解产物配施化肥可显著提高土壤脲酶、转化酶活性、微生物生物量碳和微生物生物量氮,同时该处理下的花生出苗和植株生长情况较好,苗期秸秆生物量和株高等均高于其他处理。由此可见,碱渣处理的花生秸秆腐解产物配施化肥对提升土壤质量,促进作物生长效果显著。
Effects of different additives on the pH and biological properties of peanut straw and the growth of peanut seedling were studied under pot experiment in greenhouse. 5% alkali sludge and 3% FeSO4 were used to treat the decomposition products of straw and fertilizers (A), 3% FeSO4 was used to treat the decomposed straw with the fertilizers (F), 5% AF), 6 treatments of fertilizers (N, NPK and CK) without additives on the soil pH, microbial biomass and enzyme activity at seedling stage The changes of biomass and height of peanut seedling were observed. The results showed that applying chemical fertilizers could easily aggravate the red soil acidification and lead to the decrease of soil biological activity. Fertilizer with alkali residue and fertilizer with FeSO4 treatment of two straw decomposition products can effectively slow down the acidification of red soil; alkali residue treatment of straw decomposition products with fertilizer can significantly increase soil urease, invertase activity, microbial biomass carbon and microorganisms Biomass nitrogen, and the peanut emergence and plant growth under this treatment were better, the biomass and plant height of straw at the seedling stage were higher than other treatments. Thus, the treatment of peanut stalk decomposition of alkali residue fertilizers fertilizer to improve soil quality and promote crop growth effect is remarkable.