摘要
本试验研究了4年、9年和17年3个不同种植年限的塑料大棚秋黄瓜生育期内土壤养分含量和3种酶活性的变化。结果表明:土壤养分含量和3种酶的活性以建棚9年的最高,其次是4年的,最低的是17年的,说明建棚9年时,土壤肥力达到高峰,以后逐渐下降。3种酶活性与土壤有机质、全氮的含量具有显著的相关性,反映3种酶活性与土壤肥力和养分供给有一定的关系。
Soil organic matter,total N,available P and K,and three enzyme activities were measured in the protected land with different culturing time.It was found that these parameters were high in the 9 years old cultured soil,low in the 17 years old cultured soil. This indicates that soil fertility gradually increases durig 9 years culturing stage,but after- ward decreas.The three enzyme activities were closely linearly related with soil organic matter and total N.The enzyme activities can be used as an indicator of soil fertility and nutrient capacity.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1997年第S2期83-86,共4页
Journal of China Agricultural University
关键词
大棚菜地
土壤养分
土壤酶活性
protected soil
soil nutrient
soil enzyme activity
