Water-saving and salinity-controlling planting method of oil sunflower in saline-alkali wetland

Abstract

The invention relates to a water-saving and salinity-controlling planting method of oil sunflower in saline-alkali wetland and belongs to the technical field of crop planting with an aim to solve thetechnical problem that in arid or semi-arid areas with shortage of fresh water resources, high underground water and heavy saline-alkali soil, the oil sunflower planted in the saline-alkali wetland islow in emergency rate and survival rate of seedlings. The key point of the technical scheme to the problem lies in that the method includes that 1, land leveling and preparation must act according tocircumstances, and before winter irrigation of alkali-affected soil, farm manure, calcium superphosphate and chemical improver treatment are performed; 2, furrow ridges are divided by adopting wide-narrow rows, the oil sunflower is sown in side furrows of the ridges after ridge forming and film covering, and fertilizer is applied to bottoms of the furrows; 3, in oil sunflower growing period, onlyone furrow irrigation is needed, no accumulative water is caused in the field after irrigation, and no irrigation is needed if heavy rainfall is available in the seedling period. With the method, thetechnical shortcoming that the low-lying saline-alkali wetland is less prone to dry farming is overcome, natural rainfall is sufficiently utilized, irrigation water is saved, and the effect of improving the seedling rate and yield is obvious.

Description

technical field [0001] The patent of the invention relates to a method for planting oil sunflowers in low-lying saline-alkali land with water-saving and salt-controlling. Background technique [0002] The Yinbei Irrigation District is the area where water and salt are collected in the Yinchuan Plain of Ningxia, and it is also the hardest hit area for the saline-alkali land in Ningxia. In the Yinbei irrigation area, the improvement of saline-alkali land faces the contradictions of high groundwater level and water shortage, as well as soil salinization and alkalization. The high groundwater level is the fundamental reason for the formation of modern saline-alkali soil in Yinbei irrigation area. In the low-lying areas of the Yinbei Irrigation District, the drainage is poor, the groundwater table is high, and the soil salinization is more serious. Planting salt-tolerant crops is an effective measure to improve saline-alkali land. Because oil sunflower is relatively salt-alkali...

AI Technical Summary

Problems solved by technology

In the Yinbei Irrigation District of Ningxia, the traditional oil sunflower planting method needs to be flooded twice during the growth period. However, in the Yinbei Irrigation District of Ningxia, where fresh water resources are scarce, the groundwater level is high, and the soil is both salty and alkaline, the traditional oil sunflower planting method is adopted. The method not only increases the risk of increasing soil salinity due to the high irrigation volume due to the continuous increase of the groundwater level, but also has the problems of low seedling emergence rate and low seedling preservation rate when planting oil sunflowers on low-lying saline-alkali land. Improper irrigation can easily cause dead seedlings of oil sunflower