论文部分内容阅读
在有机无机肥配施下,对灌耕灰钙土土壤碱性磷酸酶活性、速效磷、土壤全磷及其相关性进行研究。结果表明,土壤中碱性磷酸酶活性,剖面分布0~10 cm土层>10~20 cm土层>20~40 cm土层,有机处理明显高于无机处理,休闲(F)处理极显著高于无机处理,秸秆(S)、秸秆+NP肥(SNP)处理较高,N肥、NP肥处理显著高于对照(CK),NPK肥处理低于对照(CK),P肥处理活性较低;小麦苗期和灌浆期高于分蘖期和拔节期,收获期低于播种前。小麦收获期,在0~10 cm、10~20 cm、20~40 cm土层中,土壤全磷含量施肥处理比对照(CK)分别减少0.06~0.18 g kg-1、增加0.02~0.14 g kg-1、增加0.02~0.14 g kg-1,秸秆+NP肥(SNP)和NP肥处理土壤全磷含量显著高于其他处理。土壤速效磷含量,各处理大小顺序依次是:NP肥>P肥>NPK肥>羊粪+NP肥>秸秆+NP肥,秸秆(S)>羊粪(M),小麦生育期呈先减小后增加又减少的趋势,在灌浆期和分蘖期较高。各个施肥处理,土壤碱性磷酸酶与土壤速效磷达到极显著直线正相关,土壤碱性磷酸酶活性可以反映土壤速效磷含量,土壤碱性磷酸酶活性可以作为指示灌耕灰钙土土壤磷素状况的灵敏指标。
Under the combination of organic and inorganic fertilizers, the activities of alkaline phosphatase, available phosphorus and total phosphorus in irrigated cultivated soils were studied. The results showed that the activities of alkaline phosphatase in soil, the distribution of 0-10 cm soil layer> 10-20 cm soil layer> 20-40 cm soil layer were significantly higher in organic treatment than in inorganic treatment and extremely high in leisure (F) treatment Inorganic treatment, straw (S), straw + NP fertilizer (SNP) treatment was higher, N fertilizer, NP fertilizer treatment was significantly higher than CK, NPK fertilizer treatment was lower than CK, P fertilizer treatment activity was low ; The wheat seedling stage and grain filling stage were higher than the tillering stage and jointing stage, the harvesting stage was lower than before sowing. At the harvest stage of wheat, soil total P fertilizer application decreased 0.06-0.18 g kg-1 and increased 0.02-0.14 g kg-1 in the 0-10 cm, 10-20 cm and 20-40 cm soil layers, respectively -1, 0.02 ~ 0.14 g kg-1 increase, total phosphorus content of straw + NP fertilizer (SNP) and NP fertilizer treatment was significantly higher than other treatments. The contents of available P in soil and the order of treatments were: NP fertilizer> P fertilizer> NPK fertilizer> sheep manure + NP fertilizer> straw + NP fertilizer, straw (S)> sheep manure (M) After the increase and decrease of the trend in the filling and tillering stage higher. Soil fertility, soil alkaline phosphatase and soil available phosphorus reached a significant positive linear correlation, soil alkaline phosphatase activity can reflect the content of available phosphorus in soil, soil alkaline phosphatase activity can be used as an indicator of irrigation of soil calcium Sensitive indicators of the situation.