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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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The changes of Invertase 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.g002: The changes of Invertase 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 the harvest during each of the four years (Fig. 2), the soil invertase activity levels in the 0–40 cm layers with different treatments were higher than the control, the H and M treatments showed much more potential in increasing the soil invertase activity levels as the study years went on. And throughout the wheat straw incorporation experiment, the increase of soil invertase activity levels with the H treatment than the CK were in the range of 28.6–52.1% (P < 0.05), and the increase range of the M treatment were 26.9–37.3% (P < 0.05), whereas there were no significant differences between L and CK.


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 Invertase 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.g002: The changes of Invertase 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 the harvest during each of the four years (Fig. 2), the soil invertase activity levels in the 0–40 cm layers with different treatments were higher than the control, the H and M treatments showed much more potential in increasing the soil invertase activity levels as the study years went on. And throughout the wheat straw incorporation experiment, the increase of soil invertase activity levels with the H treatment than the CK were in the range of 28.6–52.1% (P < 0.05), and the increase range of the M treatment were 26.9–37.3% (P < 0.05), whereas there were no significant differences between L and CK.

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