论文部分内容阅读
渭北旱塬在近期不可能完全实现水利化,主要应采取以耕作蓄水,以肥调水,以磷促根等农业措施。充分利用500—600mm 的降水,发挥旱地小麦的最大增产潜力。(一)种在高产期,以壮苗用水适期早播,培育壮苗,是充分利用天然降水防旱、抗旱的有效措施。实践证明,“弱菌难促,旺苗好控”,晚播所造成的损失也远比旱播为大。若遇干旱年份,根据“藉墒不等时”的经验,适期抢早较适期偏晚也更为可靠。为了防止因适期早播而形成旺苗,可根据地力、施肥及品种特性等适当减少播量,力争把冬前每亩总茎数控制在最适宜的范围内(50—
Weibei arid plateau in the near future can not be fully realized water conservancy, mainly to take farming water, fertilizer and water, phosphorus and other agricultural measures. Make full use of 500-600mm precipitation, to maximize the yield potential of dryland wheat. (A) species In the high-yielding period, with early seedling water suitable for early sowing, nurturing strong seedlings, is full use of natural precipitation drought, drought-effective measures. Practice has proved that “weak bacteria difficult to promote, Wang Miao good control,” the loss caused by late-night broadcast is also much larger than the dry broadcast. In case of drought years, according to “borrow moisture from time to time,” the experience of appropriate early snatch earlier than the appropriate phase is also more reliable. In order to prevent the emergence of seedlings due to early sowing period, according to fertility, fertilization and variety characteristics such as the appropriate reduction of sowing, and strive to control the total stem per acre before winter in the most appropriate range (50 -