|
|
|
| Analysis of factors influencing quality of newly increased cultivated land and grain productivity in arid highland area —taking occupation complementary balance project as an example |
| HE Zhenjia1, HE Wei2*, LI Liurong3, ZHANG Jun1,4, LI He1 |
| 1. Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi′an, Shaanxi 710075, China;2. School of Water Resources and Hydropower, Xi′an University of Technology, Xi′an, Shaanxi 710048, China; 3. CCCC First Highway Northwest Engineering Co., Ltd., Xi′an, Shaanxi 710199, China; 4. Shaanxi Dijian Guantian Investment Construction Co., Ltd., Baoji, Shaanxi 721000, China |
|
|
|
|
Abstract In order to reveal the impact of the arable land complementary balance project on the grain production capacity of the Weibei platform area, with winter wheat and spring corn as the quantitative standards, and the Logistic regression model is adopted to study the factors influencing grain producti-vity of newly added farmland for typical arable land complementary balance project in Weibei platform area Qianyang County in 2017. At the same time, the changes in the physical and chemical properties of the newly added arable land before and after the implementation of the project were analyzed. The results show that the implementation of complementary balance project increased the level of new cultivated land by 1 to 2 levels, and the larger the proportion of irrigated land in the newly increased cultivated land, the higher the level of newly added cultivated land. The increase rate of grain production capacity per unit area of irrigated land is 25% higher than that of dry land. With the increase in the implementation years of the complementary balance project, the physical and chemical properties of soil have been continuously improved, the total soil porosity, large aggregates, water-stable aggregates and micro-aggregates all increase significantly(P<0.05), the damage rate of soil structure was significantly reduced(P<0.05), and the erosion resistance was significantly improved(P<0.05). The quality ratio of soil organic matter increased significantly(P<0.05), and the status of soil nutrientsimproved continuously. Factors such as the area, the level, infrastructure, the investment per unit area, years and the other factors of newly increased cultivated land are positively correlated with grain production capacity. The influence degree of each factor on the grain production capacity of the newly increased cultivated land is ranked from large to small in terms of grade, area, infrastructure, age and investment.
|
|
Received: 19 April 2022
|
|
|
|
|
|
|
