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Effects of wheat straw incorporation on the availability of soil nutrients and enzyme activities in semiarid areas.

Wei T, Zhang P, Wang K, Ding R, Yang B, Nie J, Jia Z, Han Q - PLoS ONE (2015)

Bottom Line: To provide a basis for the establishment of a soil amelioration technical system for rainfed fields in the semiarid area of northwest China, we conducted a four-year (2007-2011) field experiment to determine the effects of wheat straw incorporation on the arid soil nutrient levels of cropland cultivated with winter wheat after different straw incorporation levels.On average, the urease, phosphatase, and invertase levels in the 0-40 cm soil layers were 24.4-31.3%, 9.9-36.4%, and 42.9-65.3% higher, respectively.Higher yields coupled with higher nutrient contents were achieved with H, M and L compared with CK, where these treatments increased the crop yields by 26.75%, 21.51%, and 7.15%, respectively.

View Article: PubMed Central - PubMed

Affiliation: The Chinese Institute of Water-saving Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Crop Physi-ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, China.

ABSTRACT
Soil infertility is the main barrier to dryland agricultural production in China. To provide a basis for the establishment of a soil amelioration technical system for rainfed fields in the semiarid area of northwest China, we conducted a four-year (2007-2011) field experiment to determine the effects of wheat straw incorporation on the arid soil nutrient levels of cropland cultivated with winter wheat after different straw incorporation levels. Three wheat straw incorporation levels were tested (H: 9000 kg hm(-2), M: 6000 kg hm(-2), and L: 3000 kg hm(-2)) and no straw incorporation was used as the control (CK). The levels of soil nutrients, soil organic carbon (SOC), soil labile organic carbon (LOC), and enzyme activities were analyzed each year after the wheat harvest. After straw incorporation for four years, the results showed that variable straw amounts had different effects on the soil fertility indices, where treatment H had the greatest effect. Compared with CK, the average soil available N, available P, available K, SOC, and LOC levels were higher in the 0-40 cm soil layers after straw incorporation treatments, i.e., 9.1-30.5%, 9.8-69.5%, 10.3-27.3%, 0.7-23.4%, and 44.4-49.4% higher, respectively. On average, the urease, phosphatase, and invertase levels in the 0-40 cm soil layers were 24.4-31.3%, 9.9-36.4%, and 42.9-65.3% higher, respectively. Higher yields coupled with higher nutrient contents were achieved with H, M and L compared with CK, where these treatments increased the crop yields by 26.75%, 21.51%, and 7.15%, respectively.

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Related in: MedlinePlus

The changes of Urease activities in 0–20 and 20–40 cm soil layers under different wheat straw incorporation treatments.Note: CK, no straw incorporation; L, incorporation of straw at a low rate of 3 000 kg hm-2 wheat straw; M, incorporation of straw at a medium rate of 6 000 kg hm-2 wheat straw; H, incorporation of straw at a high rate of 9 000 kg hm-2 wheat straw. Bars with different lowercase letters indicate significant differences (P<0.05).
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pone.0120994.g001: The changes of Urease activities in 0–20 and 20–40 cm soil layers under different wheat straw incorporation treatments.Note: CK, no straw incorporation; L, incorporation of straw at a low rate of 3 000 kg hm-2 wheat straw; M, incorporation of straw at a medium rate of 6 000 kg hm-2 wheat straw; H, incorporation of straw at a high rate of 9 000 kg hm-2 wheat straw. Bars with different lowercase letters indicate significant differences (P<0.05).

Mentions: After four years of straw incorporation practices, the urease activity levels in the 0–40 cm soil layers were higher with all treatments compared with CK (Fig. 1). With the increase amount of wheat straw incorporation, the invertase activity levels were 15.3%, 42.2% and 32.5% higher with the three treatments respectively than CK in 2011, only the H and M treatments were significantly superior to the control (P < 0.05).


Effects of wheat straw incorporation on the availability of soil nutrients and enzyme activities in semiarid areas.

Wei T, Zhang P, Wang K, Ding R, Yang B, Nie J, Jia Z, Han Q - PLoS ONE (2015)

The changes of Urease activities in 0–20 and 20–40 cm soil layers under different wheat straw incorporation treatments.Note: CK, no straw incorporation; L, incorporation of straw at a low rate of 3 000 kg hm-2 wheat straw; M, incorporation of straw at a medium rate of 6 000 kg hm-2 wheat straw; H, incorporation of straw at a high rate of 9 000 kg hm-2 wheat straw. Bars with different lowercase letters indicate significant differences (P<0.05).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4400158&req=5

pone.0120994.g001: The changes of Urease activities in 0–20 and 20–40 cm soil layers under different wheat straw incorporation treatments.Note: CK, no straw incorporation; L, incorporation of straw at a low rate of 3 000 kg hm-2 wheat straw; M, incorporation of straw at a medium rate of 6 000 kg hm-2 wheat straw; H, incorporation of straw at a high rate of 9 000 kg hm-2 wheat straw. Bars with different lowercase letters indicate significant differences (P<0.05).
Mentions: After four years of straw incorporation practices, the urease activity levels in the 0–40 cm soil layers were higher with all treatments compared with CK (Fig. 1). With the increase amount of wheat straw incorporation, the invertase activity levels were 15.3%, 42.2% and 32.5% higher with the three treatments respectively than CK in 2011, only the H and M treatments were significantly superior to the control (P < 0.05).

Bottom Line: To provide a basis for the establishment of a soil amelioration technical system for rainfed fields in the semiarid area of northwest China, we conducted a four-year (2007-2011) field experiment to determine the effects of wheat straw incorporation on the arid soil nutrient levels of cropland cultivated with winter wheat after different straw incorporation levels.On average, the urease, phosphatase, and invertase levels in the 0-40 cm soil layers were 24.4-31.3%, 9.9-36.4%, and 42.9-65.3% higher, respectively.Higher yields coupled with higher nutrient contents were achieved with H, M and L compared with CK, where these treatments increased the crop yields by 26.75%, 21.51%, and 7.15%, respectively.

View Article: PubMed Central - PubMed

Affiliation: The Chinese Institute of Water-saving Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Crop Physi-ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, China.

ABSTRACT
Soil infertility is the main barrier to dryland agricultural production in China. To provide a basis for the establishment of a soil amelioration technical system for rainfed fields in the semiarid area of northwest China, we conducted a four-year (2007-2011) field experiment to determine the effects of wheat straw incorporation on the arid soil nutrient levels of cropland cultivated with winter wheat after different straw incorporation levels. Three wheat straw incorporation levels were tested (H: 9000 kg hm(-2), M: 6000 kg hm(-2), and L: 3000 kg hm(-2)) and no straw incorporation was used as the control (CK). The levels of soil nutrients, soil organic carbon (SOC), soil labile organic carbon (LOC), and enzyme activities were analyzed each year after the wheat harvest. After straw incorporation for four years, the results showed that variable straw amounts had different effects on the soil fertility indices, where treatment H had the greatest effect. Compared with CK, the average soil available N, available P, available K, SOC, and LOC levels were higher in the 0-40 cm soil layers after straw incorporation treatments, i.e., 9.1-30.5%, 9.8-69.5%, 10.3-27.3%, 0.7-23.4%, and 44.4-49.4% higher, respectively. On average, the urease, phosphatase, and invertase levels in the 0-40 cm soil layers were 24.4-31.3%, 9.9-36.4%, and 42.9-65.3% higher, respectively. Higher yields coupled with higher nutrient contents were achieved with H, M and L compared with CK, where these treatments increased the crop yields by 26.75%, 21.51%, and 7.15%, respectively.

Show MeSH
Related in: MedlinePlus