[Dynamics of soil enzyme activity and nutrient content in intercropped cotton rhizosphere and non-rhizosphere].
The study with high yield cotton-wheat double cropping system showed that soil urease, invertase, protease and catalase activities in intercropped cotton field had the same changing trends with those in mono-cultured cotton field, but were significantly higher in intercropped than in mono-cultured cotton rhizosphere and non-rhizosphere at all development stages of cotton. During the intergrowth period of wheat and cotton, soil nutrient contents in intercropped cotton rhizosphere and non-rhizosphere were lower than or had little difference with those in mono-cultured cotton rhizosphere and non-rhizosphere, but became significantly higher after wheat harvested. The changing trends of soil nutrient contents in intercropped cotton field had little difference from those in mono-cultured cotton field, but the nutrient absorption peak appeared late. The soil enzyme activities and nutrient contents were generally higher in rhizosphere than in non-rhizosphere of both intercropped and mono-cultured cotton. Soil nutrient contents had significant (P < 0.05, n = 32) or very significant (P < 0.01, n = 32) correlation with the activities of soil urease, invertase and protease, but had little correlation with soil catalase activity.
Key Laboratory of Crop Growth Regulation of Agriculture Ministry, Nanjing Agricultural University, China.
Yali
Y
Meng
Liguo
L
Wang
Zhiguo
Z
Zhou
Ying
Y
Wang
Lizhen
L
Zhang
Haiyun
H
Bian
Siping
S
Zhang
Binglin
B
Chen
D000383:Agriculture / Q000379:methods*; D003368:Gossypium / Q000254:growth & development*; D009584:Nitrogen / Q000032:analysis; D018517:Plant Roots / Q000201:enzymology*; D012987:Soil / Q000032:analysis*; D014908:Triticum / Q000254:growth & development*; D014510:Urease / Q000378:metabolism; D043324:beta-Fructofuranosidase / Q000378:metabolism
D012987:Soil; D043324:beta-Fructofuranosidase; D014510:Urease; D009584:Nitrogen