长期耕作对半干旱区人工沙质稻田土壤理化性质及酶活性的影响

丛安琪, 詹瑾, 王宁, 张铜会, 刘新平

Effects of long-term cultivation on soil physicochemical properties and enzyme activities of artificial sandy paddy field in semi-arid region

Anqi Cong, Jin Zhan, Ning Wang, Tonghui Zhang, Xinping Liu

表2 耕作年限对人工沙质稻田土壤机械组成的影响

Table 2 Effect of cropping years on soil mechanical composition in artificial sandy paddy

耕作年限/a	不同粒径土壤机械组成/%
耕作年限/a	>0.25 mm	0.10~0.25 mm	0.05~0.10mm	<0.05 mm
0~10 cm土层
CK	45.21±3.97^a	43.15±1.82^a	3.03±1.23^b	8.60±1.84^c
1	44.74±1.41^a	41.93±0.73^a	3.22±0.95^b	10.11±1.14^bc
5	39.37±3.23^ab	41.40±1.57^a	4.73±1.47^ab	14.49±0.47^ab
10	41.29±3.70^ab	41.48±0.89^a	4.43±1.34^ab	12.79±1.70^abc
15	41.72±3.37^ab	41.70±1.18^a	5.48±1.78^ab	11.10±2.48^bc
20	35.76±2.17^ab	43.94±1.30^a	7.55±1.34^ab	12.75±2.09^abc
27	32.17±1.98^b	42.48±2.00^a	8.34±1.74^a	17.01±1.74^a
10~20 cm土层
CK	44.13±1.24^a	45.18±1.21^a	3.53±1.66	8.41±0.93^b
1	41.65±1.69^ab	43.14±1.19^ab	2.82±0.77^c	12.39±0.71^ab
5	38.81±3.53^abc	41.02±1.04^b	5.23±1.51^bc	14.95±1.11^a
10	41.99±2.46^ab	41.92±0.90^ab	3.65±0.55^c	12.44±1.35^ab
15	43.14±2.14^a	41.47±1.24^ab	4.22±1.33^bc	11.18±1.52^ab
20	35.32±0.85^bc	43.48±1.92^ab	7.60±1.01^ab	13.60±1.68^a
27	32.35±2.18^c	42.37±0.74^ab	10.09±0.57^a	15.20±1.77^a